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IONOS / 1&1

Registrar DNS Serves 1,625,664 gTLD domains across 481 TLDs, 2.98% of all domains whose nameservers we can attribute. www.ionos.com/

New gTLDs Legacy gTLDs All gTLDs
The registrar's own nameservers, used by default for domains that have not been pointed elsewhere — which includes both active sites and domains doing nothing at all.

How domains are attributed here

A domain counts towards IONOS / 1&1 when one of its nameservers ends in one of these suffixes. Matching is on the name in the zone's NS records only — nothing is resolved or fetched. Listed by weight, which is the order the classifier tries them in so a specific suffix beats a broader one.

Nameserver suffixWeight
1and1-dns.com 10
ui-dns.biz 10
ui-dns.com 10
ui-dns.de 10
ui-dns.org 10

Where its domains are

.org — 391.42k (24.08%).net — 285.38k (17.55%).info — 276.62k (17.02%).store — 166.42k (10.24%).online — 124.00k (7.63%).app — 39,312 (2.42%).biz — 27,920 (1.72%).shop — 26,416 (1.62%).cloud — 22,415 (1.38%).xyz — 12,365 (0.76%)Other — 253.40k (15.59%)
1.63Mzone, 19 Aug 2026
.org391.42k24.08%
.net285.38k17.55%
.info276.62k17.02%
.store166.42k10.24%
.online124.00k7.63%
.app39,3122.42%
.biz27,9201.72%
.shop26,4161.62%
.cloud22,4151.38%
.xyz12,3650.76%
Other471 more TLDs253.40k15.59%

The ten largest of 481 TLDs, with the rest combined; all of them are in the table below.

Nameservers in use

as of 19 Aug 2026

The hostnames actually found in the zones, with how many domains name each. The suffixes above are the rule; these are what the rule matched. Counted across all gTLDs rather than the current scope, since the aggregate is built in one pass over every zone. Showing the fifteen largest.

Nameserver Domains Share of these
ns-de.1and1-dns.com 28,934
13.7%
ns1045.ui-dns.biz 22,724
10.8%
ns1016.ui-dns.biz 13,805
6.6%
ns1017.ui-dns.biz 13,319
6.3%
ns1021.ui-dns.biz 13,244
6.3%
ns1018.ui-dns.biz 13,016
6.2%
ns1019.ui-dns.biz 12,905
6.1%
ns1023.ui-dns.biz 12,108
5.7%
ns1020.ui-dns.biz 11,845
5.6%
ns1022.ui-dns.biz 11,805
5.6%
ns1024.ui-dns.biz 11,728
5.6%
ns-us.1and1-dns.com 11,636
5.5%
ns1025.ui-dns.biz 11,580
5.5%
ns1027.ui-dns.biz 11,239
5.3%
ns1018.ui-dns.com 10,739
5.1%

These 15 nameservers carry 210,627 of the 1,625,714 domains this provider serves across every zone we parse, which spans new and legacy gTLDs together — more than the 1,625,664 counted under gTLDs alone.

TLDs served

as of 19 Aug 2026
TLD Domains here Share of this provider Of the TLD
.computer 210
0.01%
2.26%
.engineering 210
0.01%
1.89%
.chat 212
0.01%
0.38%
.sale 212
0.01%
1.49%
.audio 213
0.01%
3.85%
.productions 218
0.01%
2.04%
.top 218
0.01%
0%
.lighting 220
0.01%
4.1%
.party 230
0.01%
1.14%
.lawyer 231
0.01%
2.82%
.pub 236
0.01%
1.34%
.tours 239
0.01%
1.83%
.health 244
0.02%
0.39%
.wiki 246
0.02%
0.19%
.clothing 247
0.02%
2.65%
.express 253
0.02%
2.99%
.click 254
0.02%
0.03%
.foundation 256
0.02%
0.82%
.cool 265
0.02%
1.21%
.directory 266
0.02%
1.78%
.fashion 268
0.02%
2.09%
.run 268
0.02%
0.2%
.vet 271
0.02%
2.32%
.properties 281
0.02%
2.15%
.vip 281
0.02%
0.02%
.contact 282
0.02%
2.43%
.help 287
0.02%
0.15%
.pet 287
0.02%
1.44%
.gal 289
0.02%
3.75%
.yoga 290
0.02%
0.92%
.clinic 295
0.02%
1.58%
.boutique 296
0.02%
1.61%
.show 296
0.02%
1.58%
.market 298
0.02%
1.57%
.wtf 298
0.02%
0.7%
.dance 300
0.02%
3.52%
.golf 300
0.02%
1.61%
.bar 305
0.02%
0.7%
.barcelona 308
0.02%
6.75%
.limited 308
0.02%
4.59%
.farm 320
0.02%
1.17%
.ventures 320
0.02%
1.34%
.estate 328
0.02%
2.89%
.promo 329
0.02%
4.93%
.wine 330
0.02%
1.45%
.video 336
0.02%
1.35%
.vision 345
0.02%
3.04%
.taxi 348
0.02%
5.14%
.onl 349
0.02%
0.61%
.restaurant 351
0.02%
4.17%
.love 356
0.02%
0.56%
.direct 366
0.02%
2.97%
.finance 368
0.02%
1.09%
.partners 373
0.02%
2.16%
.fitness 376
0.02%
2.79%
.dog 381
0.02%
2.13%
.guide 392
0.02%
1.98%
.tools 406
0.02%
1.36%
.house 422
0.03%
1.68%
.dental 426
0.03%
4.84%
.reisen 438
0.03%
10.63%
.fit 444
0.03%
0.53%
.institute 451
0.03%
2.08%
.madrid 453
0.03%
14.15%
.solar 458
0.03%
4.86%
.gmx 477
0.03%
99.79%
.photos 487
0.03%
2.57%
.zone 492
0.03%
1.26%
.capital 497
0.03%
1.37%
.band 509
0.03%
2.57%
.city 534
0.03%
1.68%
.cafe 546
0.03%
2.19%
.works 551
0.03%
1.45%
.bike 554
0.03%
3.51%
.school 559
0.03%
2.3%
.social 570
0.04%
1.19%
.africa 571
0.04%
0.96%
.kaufen 576
0.04%
12.6%
.schule 577
0.04%
12.38%
.tax 579
0.04%
3.38%
.haus 588
0.04%
6.92%
.land 600
0.04%
2.83%
.photo 602
0.04%
3.71%
.wien 608
0.04%
4.1%
.eus 612
0.04%
3.83%
.guru 613
0.04%
1.09%
.coffee 628
0.04%
2.26%
.cymru 640
0.04%
7.4%
.asia 646
0.04%
0.09%
.management 653
0.04%
5.38%
.law 667
0.04%
2.72%
.cologne 677
0.04%
17.48%
.software 692
0.04%
2.67%
.gallery 697
0.04%
3.95%
.saarland 702
0.04%
18.92%
.earth 730
0.04%
1.79%
.tips 741
0.05%
3.98%
.technology 743
0.05%
2.23%
.community 752
0.05%
3.01%
.games 756
0.05%
1.04%

Data currency. Domain counts on this page are from zone files dated and refresh daily. Registrar figures are from ICANN's monthly registry reports for April 2026, which ICANN publishes about three months in arrears; zone files contain no registrar information, so no fresher source exists. Full detail on methodology and live pipeline status.