diff --git a/iana-domains-db.json b/iana-domains-db.json
index 87484b4c..c0e379f6 100644
--- a/iana-domains-db.json
+++ b/iana-domains-db.json
@@ -19,11 +19,11 @@
     "actor": "whois.nic.actor",
     "ad": "whois.nic.ad",
     "adac": null,
-    "ads": "whois.nic.google",
+    "ads": "whois.nic.ads",
     "adult": "whois.nic.adult",
     "ae": null,
     "aeg": "whois.nic.aeg",
-    "aero": "whois.aero",
+    "aero": null,
     "aetna": "whois.nic.aetna",
     "af": "whois.nic.af",
     "afamilycompany": null,
@@ -48,7 +48,7 @@
     "ally": "whois.nic.ally",
     "alsace": "whois.nic.alsace",
     "alstom": "whois.nic.alstom",
-    "am": "whois.nic.am",
+    "am": "whois.amnic.net",
     "amazon": "whois.nic.amazon",
     "americanexpress": "whois.nic.americanexpress",
     "americanfamily": "whois.nic.americanfamily",
@@ -58,13 +58,13 @@
     "amsterdam": "whois.nic.amsterdam",
     "an": null,
     "analytics": "whois.nic.analytics",
-    "android": "whois.nic.google",
-    "anquan": "whois.teleinfo.cn",
+    "android": "whois.nic.android",
+    "anquan": "whois.nic.anquan",
     "anz": "whois.nic.anz",
     "ao": null,
     "aol": "whois.nic.aol",
     "apartments": "whois.nic.apartments",
-    "app": "whois.nic.app",
+    "app": "whois.nic.google",
     "apple": "whois.nic.apple",
     "aq": null,
     "aquarelle": "whois.nic.aquarelle",
@@ -83,7 +83,7 @@
     "at": "whois.nic.at",
     "athleta": "whois.nic.athleta",
     "attorney": "whois.nic.attorney",
-    "au": "whois.auda.org.au",
+    "au": null,
     "auction": "whois.nic.auction",
     "audi": "whois.nic.audi",
     "audible": "whois.nic.audible",
@@ -123,7 +123,7 @@
     "bcg": "whois.nic.bcg",
     "bcn": "whois.nic.bcn",
     "bd": null,
-    "be": "whois.dns.be",
+    "be": null,
     "beats": "whois.nic.beats",
     "beauty": "whois.nic.beauty",
     "beer": "whois.nic.beer",
@@ -133,10 +133,10 @@
     "bestbuy": "whois.nic.bestbuy",
     "bet": "whois.nic.bet",
     "bf": "whois.registre.bf",
-    "bg": null,
+    "bg": "whois.register.bg",
     "bh": "whois.nic.bh",
     "bharti": "whois.nic.bharti",
-    "bi": "whois1.nic.bi",
+    "bi": "whois.nic.bi",
     "bible": "whois.nic.bible",
     "bid": "whois.nic.bid",
     "bike": "whois.nic.bike",
@@ -159,13 +159,13 @@
     "bn": null,
     "bnl": null,
     "bnpparibas": "whois.nic.bnpparibas",
-    "bo": null,
+    "bo": "whois.nic.bo",
     "boats": "whois.nic.boats",
     "boehringer": "whois.nic.boehringer",
     "bofa": "whois.nic.bofa",
-    "bom": "whois.gtlds.nic.br",
+    "bom": "whois.nic.bom",
     "bond": "whois.nic.bond",
-    "boo": "whois.nic.google",
+    "boo": "whois.nic.boo",
     "book": "whois.nic.book",
     "booking": "whois.nic.booking",
     "boots": null,
@@ -193,11 +193,11 @@
     "buy": "whois.nic.buy",
     "buzz": "whois.nic.buzz",
     "bv": null,
-    "bw": null,
-    "by": null,
+    "bw": "whois.nic.net.bw",
+    "by": "whois.cctld.by",
     "bz": null,
     "bzh": "whois.nic.bzh",
-    "ca": "whois.cira.ca",
+    "ca": null,
     "cab": "whois.nic.cab",
     "cafe": "whois.nic.cafe",
     "cal": "whois.nic.google",
@@ -231,7 +231,7 @@
     "cbn": "whois.nic.cbn",
     "cbre": "whois.nic.cbre",
     "cbs": null,
-    "cc": "whois.nic.cc",
+    "cc": "ccwhois.verisign-grs.com",
     "cd": "whois.nic.cd",
     "ceb": null,
     "center": "whois.nic.center",
@@ -243,7 +243,7 @@
     "cg": null,
     "ch": "whois.nic.ch",
     "chanel": "whois.nic.chanel",
-    "channel": "whois.nic.google",
+    "channel": "whois.nic.channel",
     "charity": "whois.nic.charity",
     "chase": "whois.nic.chase",
     "chat": "whois.nic.chat",
@@ -251,10 +251,10 @@
     "chintai": "whois.nic.chintai",
     "chloe": null,
     "christmas": "whois.nic.christmas",
-    "chrome": "whois.nic.chrome",
+    "chrome": "whois.nic.google",
     "chrysler": null,
     "church": "whois.nic.church",
-    "ci": null,
+    "ci": "whois.nic.ci",
     "cipriani": "whois.nic.cipriani",
     "circle": "whois.nic.circle",
     "cisco": "whois.nic.cisco",
@@ -275,14 +275,14 @@
     "club": "whois.nic.club",
     "clubmed": "whois.nic.clubmed",
     "cm": "whois.netcom.cm",
-    "cn": null,
+    "cn": "whois.cnnic.cn",
     "co": "whois.nic.co",
     "coach": "whois.nic.coach",
     "codes": "whois.nic.codes",
     "coffee": "whois.nic.coffee",
     "college": "whois.nic.college",
     "cologne": "whois.nic.cologne",
-    "com": "whois.verisign-grs.com",
+    "com": null,
     "comcast": null,
     "commbank": "whois.nic.commbank",
     "community": "whois.nic.community",
@@ -325,13 +325,13 @@
     "cyou": "whois.nic.cyou",
     "cz": "whois.nic.cz",
     "dabur": null,
-    "dad": "whois.nic.google",
+    "dad": "whois.nic.dad",
     "dance": "whois.nic.dance",
     "data": "whois.nic.data",
     "date": "whois.nic.date",
     "dating": "whois.nic.dating",
     "datsun": "whois.nic.gmo",
-    "day": "whois.nic.day",
+    "day": "whois.nic.google",
     "dclk": "whois.nic.google",
     "dds": "whois.nic.dds",
     "de": "whois.denic.de",
@@ -348,7 +348,7 @@
     "dentist": "whois.nic.dentist",
     "desi": "whois.nic.desi",
     "design": "whois.nic.design",
-    "dev": "whois.nic.google",
+    "dev": "whois.nic.dev",
     "dhl": "whois.nic.dhl",
     "diamonds": "whois.nic.diamonds",
     "diet": "whois.nic.diet",
@@ -361,7 +361,7 @@
     "diy": "whois.nic.diy",
     "dj": null,
     "dk": "whois.punktum.dk",
-    "dm": "whois.dmdomains.dm",
+    "dm": "whois.nic.dm",
     "dnp": "whois.nic.dnp",
     "do": "whois.nic.do",
     "docs": "whois.nic.google",
@@ -383,15 +383,15 @@
     "durban": "whois.nic.durban",
     "dvag": "whois.nic.dvag",
     "dvr": "whois.nic.dvr",
-    "dz": null,
+    "dz": "whois.nic.dz",
     "earth": "whois.nic.earth",
     "eat": "whois.nic.google",
-    "ec": "whois.nic.ec",
+    "ec": null,
     "eco": "whois.nic.eco",
     "edeka": "whois.nic.edeka",
-    "edu": "whois.educause.edu",
+    "edu": null,
     "education": "whois.nic.education",
-    "ee": "whois.tld.ee",
+    "ee": null,
     "eg": null,
     "eh": null,
     "email": "whois.nic.email",
@@ -407,12 +407,12 @@
     "ericsson": "whois.nic.ericsson",
     "erni": "whois.nic.erni",
     "es": "whois.nic.es",
-    "esq": "whois.nic.google",
+    "esq": "whois.nic.esq",
     "estate": "whois.nic.estate",
     "esurance": null,
     "et": null,
     "etisalat": null,
-    "eu": "whois.eu",
+    "eu": null,
     "eurovision": "whois.nic.eurovision",
     "eus": "whois.nic.eus",
     "events": "whois.nic.events",
@@ -442,7 +442,7 @@
     "fidelity": "whois.nic.fidelity",
     "fido": "whois.nic.fido",
     "film": "whois.nic.film",
-    "final": "whois.nic.final",
+    "final": "whois.gtlds.nic.br",
     "finance": "whois.nic.finance",
     "financial": "whois.nic.financial",
     "fire": "whois.nic.fire",
@@ -463,7 +463,7 @@
     "fly": "whois.nic.google",
     "fm": "whois.nic.fm",
     "fo": "whois.nic.fo",
-    "foo": "whois.nic.foo",
+    "foo": "whois.nic.google",
     "food": "whois.nic.food",
     "foodnetwork": null,
     "football": "whois.nic.football",
@@ -501,18 +501,18 @@
     "gb": null,
     "gbiz": "whois.nic.google",
     "gd": "whois.nic.gd",
-    "gdn": "whois.nic.gdn",
+    "gdn": null,
     "ge": "whois.nic.ge",
     "gea": "whois.nic.gea",
     "gent": "whois.nic.gent",
     "genting": "whois.nic.genting",
     "george": "whois.nic.george",
-    "gf": null,
-    "gg": null,
+    "gf": "whois.mediaserv.net",
+    "gg": "whois.gg",
     "ggee": "whois.nic.ggee",
     "gh": "whois.nic.gh",
     "gi": "whois.identitydigital.services",
-    "gift": "whois.nic.gift",
+    "gift": "whois.uniregistry.net",
     "gifts": "whois.nic.gifts",
     "gives": "whois.nic.gives",
     "giving": "whois.nic.giving",
@@ -521,9 +521,9 @@
     "glass": "whois.nic.glass",
     "gle": "whois.nic.gle",
     "global": "whois.nic.global",
-    "globo": "whois.gtlds.nic.br",
+    "globo": "whois.nic.globo",
     "gm": null,
-    "gmail": "whois.nic.google",
+    "gmail": "whois.nic.gmail",
     "gmbh": "whois.nic.gmbh",
     "gmo": "whois.nic.gmo",
     "gmx": "whois.nic.gmx",
@@ -532,7 +532,7 @@
     "gold": "whois.nic.gold",
     "goldpoint": "whois.nic.goldpoint",
     "golf": "whois.nic.golf",
-    "goo": "whois.nic.goo",
+    "goo": "whois.nic.gmo",
     "goodhands": null,
     "goodyear": "whois.nic.goodyear",
     "goog": "whois.nic.google",
@@ -540,8 +540,8 @@
     "gop": "whois.nic.gop",
     "got": "whois.nic.got",
     "gov": "whois.dotgov.gov",
-    "gp": "whois.nic.gp",
-    "gq": "whois.dominio.gq",
+    "gp": null,
+    "gq": null,
     "gr": null,
     "grainger": "whois.nic.grainger",
     "graphics": "whois.nic.graphics",
@@ -555,12 +555,12 @@
     "gu": null,
     "guardian": null,
     "gucci": "whois.nic.gucci",
-    "guge": "whois.nic.guge",
+    "guge": "whois.nic.google",
     "guide": "whois.nic.guide",
     "guitars": "whois.nic.guitars",
     "guru": "whois.nic.guru",
     "gw": null,
-    "gy": "whois.registry.gy",
+    "gy": null,
     "hair": "whois.nic.hair",
     "hamburg": "whois.nic.hamburg",
     "hangout": "whois.nic.google",
@@ -572,14 +572,14 @@
     "healthcare": "whois.nic.healthcare",
     "help": "whois.nic.help",
     "helsinki": "whois.nic.helsinki",
-    "here": "whois.nic.here",
+    "here": "whois.nic.google",
     "hermes": "whois.nic.hermes",
     "hgtv": null,
     "hiphop": "whois.nic.hiphop",
     "hisamitsu": "whois.nic.hisamitsu",
     "hitachi": "whois.nic.hitachi",
     "hiv": "whois.nic.hiv",
-    "hk": "whois.hkirc.hk",
+    "hk": null,
     "hkt": "whois.nic.hkt",
     "hm": "whois.registry.hm",
     "hn": "whois.nic.hn",
@@ -601,8 +601,8 @@
     "hotels": "whois.nic.hotels",
     "hotmail": "whois.nic.hotmail",
     "house": "whois.nic.house",
-    "how": "whois.nic.google",
-    "hr": "whois.dns.hr",
+    "how": "whois.nic.how",
+    "hr": "whois.nic.hr",
     "hsbc": "whois.nic.hsbc",
     "ht": "whois.nic.ht",
     "htc": null,
@@ -631,19 +631,19 @@
     "industries": "whois.nic.industries",
     "infiniti": "whois.nic.gmo",
     "info": "whois.nic.info",
-    "ing": "whois.nic.google",
+    "ing": "whois.nic.ing",
     "ink": "whois.nic.ink",
     "institute": "whois.nic.institute",
     "insurance": "whois.nic.insurance",
     "insure": "whois.nic.insure",
-    "int": null,
+    "int": "whois.iana.org",
     "intel": null,
     "international": "whois.nic.international",
     "intuit": "whois.nic.intuit",
     "investments": "whois.nic.investments",
     "io": "whois.nic.io",
     "ipiranga": "whois.nic.ipiranga",
-    "iq": null,
+    "iq": "whois.cmc.iq",
     "ir": "whois.nic.ir",
     "irish": "whois.nic.irish",
     "is": "whois.nic.is",
@@ -660,7 +660,7 @@
     "java": "whois.nic.java",
     "jcb": "whois.nic.gmo",
     "jcp": null,
-    "je": "whois.je",
+    "je": null,
     "jeep": "whois.nic.jeep",
     "jetzt": "whois.nic.jetzt",
     "jewelry": "whois.nic.jewelry",
@@ -675,7 +675,7 @@
     "joburg": "whois.nic.joburg",
     "jot": "whois.nic.jot",
     "joy": "whois.nic.joy",
-    "jp": "whois.jprs.jp",
+    "jp": null,
     "jpmorgan": "whois.nic.jpmorgan",
     "jprs": "whois.nic.jprs",
     "juegos": "whois.uniregistry.net",
@@ -710,7 +710,7 @@
     "kred": "whois.nic.kred",
     "kuokgroup": "whois.nic.kuokgroup",
     "kw": "whois.nic.kw",
-    "ky": null,
+    "ky": "whois.kyregistry.ky",
     "kyoto": "whois.nic.kyoto",
     "kz": "whois.nic.kz",
     "la": "whois.nic.la",
@@ -753,7 +753,7 @@
     "limo": "whois.nic.limo",
     "lincoln": "whois.nic.lincoln",
     "linde": null,
-    "link": "whois.uniregistry.net",
+    "link": "whois.nic.link",
     "lipsy": "whois.nic.lipsy",
     "live": "whois.nic.live",
     "living": "whois.nic.living",
@@ -775,7 +775,7 @@
     "lplfinancial": "whois.nic.lplfinancial",
     "lr": null,
     "ls": "whois.nic.ls",
-    "lt": "whois.domreg.lt",
+    "lt": null,
     "ltd": "whois.nic.ltd",
     "ltda": "whois.nic.ltda",
     "lu": "whois.dns.lu",
@@ -794,7 +794,7 @@
     "man": "whois.nic.man",
     "management": "whois.nic.management",
     "mango": "whois.nic.mango",
-    "map": "whois.nic.google",
+    "map": "whois.nic.map",
     "market": "whois.nic.market",
     "marketing": "whois.nic.marketing",
     "markets": "whois.nic.markets",
@@ -813,7 +813,7 @@
     "media": "whois.nic.media",
     "meet": "whois.nic.google",
     "melbourne": "whois.nic.melbourne",
-    "meme": "whois.nic.google",
+    "meme": "whois.nic.meme",
     "memorial": "whois.nic.memorial",
     "men": "whois.nic.men",
     "menu": "whois.nic.menu",
@@ -834,7 +834,7 @@
     "ml": "whois.nic.ml",
     "mlb": "whois.nic.mlb",
     "mls": "whois.nic.mls",
-    "mm": "whois.registry.gov.mm",
+    "mm": null,
     "mma": "whois.nic.mma",
     "mn": "whois.nic.mn",
     "mo": "whois.monic.mo",
@@ -855,11 +855,11 @@
     "moscow": "whois.nic.moscow",
     "moto": "whois.nic.moto",
     "motorcycles": "whois.nic.motorcycles",
-    "mov": "whois.nic.google",
+    "mov": "whois.nic.mov",
     "movie": "whois.nic.movie",
     "movistar": null,
     "mp": null,
-    "mq": "whois.mediaserv.net",
+    "mq": "whois.nic.mq",
     "mr": "whois.nic.mr",
     "ms": "whois.nic.ms",
     "msd": "whois.nic.msd",
@@ -894,7 +894,7 @@
     "netflix": "whois.nic.netflix",
     "network": "whois.nic.network",
     "neustar": "whois.nic.neustar",
-    "new": "whois.nic.new",
+    "new": "whois.nic.google",
     "newholland": null,
     "news": "whois.nic.news",
     "next": "whois.nic.next",
@@ -971,7 +971,7 @@
     "pccw": "whois.nic.pccw",
     "pe": "whois.nic.pe",
     "pet": "whois.nic.pet",
-    "pf": null,
+    "pf": "whois.registry.pf",
     "pfizer": "whois.nic.pfizer",
     "pg": null,
     "ph": null,
@@ -993,7 +993,7 @@
     "pink": "whois.nic.pink",
     "pioneer": "whois.nic.pioneer",
     "pizza": "whois.nic.pizza",
-    "pk": null,
+    "pk": "whois.pknic.net.pk",
     "pl": null,
     "place": "whois.nic.place",
     "play": "whois.nic.google",
@@ -1007,7 +1007,7 @@
     "poker": "whois.nic.poker",
     "politie": "whois.nic.politie",
     "porn": "whois.nic.porn",
-    "post": "whois.nic.post",
+    "post": "whois.dotpostregistry.net",
     "pr": "whois.afilias-srs.net",
     "pramerica": "whois.nic.pramerica",
     "praxi": "whois.nic.praxi",
@@ -1030,7 +1030,7 @@
     "pw": "whois.nic.pw",
     "pwc": "whois.nic.pwc",
     "py": null,
-    "qa": null,
+    "qa": "whois.registry.qa",
     "qpon": "whois.nic.qpon",
     "quebec": "whois.nic.quebec",
     "quest": "whois.nic.quest",
@@ -1068,7 +1068,7 @@
     "ricoh": "whois.nic.ricoh",
     "rightathome": null,
     "ril": "whois.nic.ril",
-    "rio": "whois.gtlds.nic.br",
+    "rio": "whois.nic.rio",
     "rip": "whois.nic.rip",
     "rmit": null,
     "ro": null,
@@ -1077,9 +1077,9 @@
     "rodeo": "whois.nic.rodeo",
     "rogers": "whois.nic.rogers",
     "room": "whois.nic.room",
-    "rs": null,
-    "rsvp": "whois.nic.rsvp",
-    "ru": "whois.nic.ru",
+    "rs": "whois.rnids.rs",
+    "rsvp": "whois.nic.google",
+    "ru": "whois.tcinet.ru",
     "rugby": "whois.nic.rugby",
     "ruhr": "whois.nic.ruhr",
     "run": "whois.nic.run",
@@ -1104,7 +1104,7 @@
     "sas": "whois.nic.sas",
     "save": "whois.nic.save",
     "saxo": "whois.nic.saxo",
-    "sb": "whois.nic.net.sb",
+    "sb": "whois.nic.sb",
     "sbi": "whois.nic.sbi",
     "sbs": "whois.nic.sbs",
     "sc": "whois.nic.sc",
@@ -1121,14 +1121,14 @@
     "scor": null,
     "scot": "whois.nic.scot",
     "sd": "whois.nic.sd",
-    "se": null,
-    "search": "whois.nic.search",
+    "se": "whois.iis.se",
+    "search": "whois.nic.google",
     "seat": "whois.nic.seat",
     "secure": "whois.nic.secure",
     "security": "whois.nic.security",
     "seek": "whois.nic.seek",
     "select": "whois.nic.select",
-    "sener": "whois.nic.rwe",
+    "sener": "whois.nic.sener",
     "services": "whois.nic.services",
     "ses": null,
     "seven": "whois.nic.seven",
@@ -1136,10 +1136,10 @@
     "sex": "whois.nic.sex",
     "sexy": "whois.nic.sexy",
     "sfr": "whois.nic.sfr",
-    "sg": null,
+    "sg": "whois.sgnic.sg",
     "sh": "whois.nic.sh",
     "shangrila": "whois.nic.shangrila",
-    "sharp": "whois.nic.sharp",
+    "sharp": "whois.nic.gmo",
     "shaw": "whois.afilias-srs.net",
     "shell": "whois.nic.shell",
     "shia": "whois.nic.shia",
@@ -1147,17 +1147,17 @@
     "shoes": "whois.nic.shoes",
     "shop": "whois.nic.shop",
     "shopping": "whois.nic.shopping",
-    "shouji": "whois.teleinfo.cn",
+    "shouji": "whois.nic.shouji",
     "show": "whois.nic.show",
     "showtime": null,
     "shriram": null,
-    "si": "whois.register.si",
+    "si": null,
     "silk": "whois.nic.silk",
     "sina": "whois.nic.sina",
     "singles": "whois.nic.singles",
     "site": "whois.nic.site",
     "sj": null,
-    "sk": null,
+    "sk": "whois.sk-nic.sk",
     "ski": "whois.nic.ski",
     "skin": "whois.nic.skin",
     "sky": "whois.nic.sky",
@@ -1179,7 +1179,7 @@
     "solutions": "whois.nic.solutions",
     "song": "whois.nic.song",
     "sony": "whois.nic.sony",
-    "soy": "whois.nic.soy",
+    "soy": "whois.nic.google",
     "spa": "whois.nic.spa",
     "space": "whois.nic.space",
     "spiegel": null,
@@ -1207,7 +1207,7 @@
     "studio": "whois.nic.studio",
     "study": "whois.nic.study",
     "style": "whois.nic.style",
-    "su": "whois.tcinet.ru",
+    "su": null,
     "sucks": "whois.nic.sucks",
     "supplies": "whois.nic.supplies",
     "supply": "whois.nic.supply",
@@ -1219,7 +1219,7 @@
     "swatch": "whois.nic.swatch",
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     "swiss": "whois.nic.swiss",
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+    "sx": "whois.sx",
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@@ -1264,12 +1264,12 @@
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     "tjx": "whois.nic.tjx",
-    "tk": "whois.dot.tk",
+    "tk": null,
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+    "tl": null,
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     "tmall": "whois.nic.tmall",
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     "tokyo": "whois.nic.tokyo",
@@ -1283,7 +1283,7 @@
     "toyota": "whois.nic.toyota",
     "toys": "whois.nic.toys",
     "tp": null,
-    "tr": "whois.nic.tr",
+    "tr": "whois.trabis.gov.tr",
     "trade": "whois.nic.trade",
     "trading": "whois.nic.trading",
     "training": "whois.nic.training",
@@ -1302,7 +1302,7 @@
     "tvs": "whois.nic.tvs",
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-    "ua": null,
+    "ua": "whois.ua",
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     "ubs": "whois.nic.ubs",
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@@ -1315,8 +1315,8 @@
     "uol": "whois.gtlds.nic.br",
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     "us": "whois.nic.us",
-    "uy": "whois.nic.org.uy",
-    "uz": "whois.cctld.uz",
+    "uy": null,
+    "uz": null,
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     "vacations": "whois.nic.vacations",
     "vana": "whois.nic.vana",
@@ -1329,7 +1329,7 @@
     "versicherung": "whois.nic.versicherung",
     "vet": "whois.nic.vet",
     "vg": "whois.nic.vg",
-    "vi": "virgil.nic.vi",
+    "vi": "whois.nic.vi",
     "viajes": "whois.nic.viajes",
     "video": "whois.nic.video",
     "vig": "whois.nic.vig",
@@ -1353,12 +1353,12 @@
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     "voto": "whois.nic.voto",
     "voyage": "whois.nic.voyage",
-    "vu": "whois.dnrs.vu",
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     "wales": "whois.nic.wales",
     "walmart": "whois.nic.walmart",
     "walter": "whois.nic.walter",
-    "wang": "whois.nic.wang",
+    "wang": "whois.gtld.knet.cn",
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@@ -1394,19 +1394,19 @@
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     "xerox": "whois.nic.xerox",
     "xfinity": null,
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@@ -1543,7 +1543,7 @@
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@@ -1560,11 +1560,11 @@
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     "xyz": "whois.nic.xyz",