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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%

Shares are of the 210,627 domains on these 15 nameservers, not of the provider's 1,625,664.

TLDs served

as of 19 Aug 2026
TLD Domains here Share of this provider Of the TLD
.haus 588
0.04%
6.92%
.tax 579
0.04%
3.38%
.schule 577
0.04%
12.38%
.kaufen 576
0.04%
12.6%
.africa 571
0.04%
0.96%
.social 570
0.04%
1.19%
.school 559
0.03%
2.3%
.bike 554
0.03%
3.51%
.works 551
0.03%
1.45%
.cafe 546
0.03%
2.19%
.city 534
0.03%
1.68%
.band 509
0.03%
2.57%
.capital 497
0.03%
1.37%
.zone 492
0.03%
1.26%
.photos 487
0.03%
2.57%
.gmx 477
0.03%
99.79%
.solar 458
0.03%
4.86%
.madrid 453
0.03%
14.15%
.institute 451
0.03%
2.08%
.fit 444
0.03%
0.53%
.reisen 438
0.03%
10.63%
.dental 426
0.03%
4.84%
.house 422
0.03%
1.68%
.tools 406
0.02%
1.36%
.guide 392
0.02%
1.98%
.dog 381
0.02%
2.13%
.fitness 376
0.02%
2.79%
.partners 373
0.02%
2.16%
.finance 368
0.02%
1.09%
.direct 366
0.02%
2.97%
.love 356
0.02%
0.56%
.restaurant 351
0.02%
4.17%
.onl 349
0.02%
0.61%
.taxi 348
0.02%
5.14%
.vision 345
0.02%
3.04%
.video 336
0.02%
1.35%
.wine 330
0.02%
1.45%
.promo 329
0.02%
4.93%
.estate 328
0.02%
2.89%
.farm 320
0.02%
1.17%
.ventures 320
0.02%
1.34%
.barcelona 308
0.02%
6.75%
.limited 308
0.02%
4.59%
.bar 305
0.02%
0.7%
.dance 300
0.02%
3.52%
.golf 300
0.02%
1.61%
.market 298
0.02%
1.57%
.wtf 298
0.02%
0.7%
.boutique 296
0.02%
1.61%
.show 296
0.02%
1.58%
.clinic 295
0.02%
1.58%
.yoga 290
0.02%
0.92%
.gal 289
0.02%
3.75%
.help 287
0.02%
0.15%
.pet 287
0.02%
1.44%
.contact 282
0.02%
2.43%
.properties 281
0.02%
2.15%
.vip 281
0.02%
0.02%
.vet 271
0.02%
2.32%
.fashion 268
0.02%
2.09%
.run 268
0.02%
0.2%
.directory 266
0.02%
1.78%
.cool 265
0.02%
1.21%
.foundation 256
0.02%
0.82%
.click 254
0.02%
0.03%
.express 253
0.02%
2.99%
.clothing 247
0.02%
2.65%
.wiki 246
0.02%
0.19%
.health 244
0.02%
0.39%
.tours 239
0.01%
1.83%
.pub 236
0.01%
1.34%
.lawyer 231
0.01%
2.82%
.party 230
0.01%
1.14%
.lighting 220
0.01%
4.1%
.productions 218
0.01%
2.04%
.top 218
0.01%
0%
.audio 213
0.01%
3.85%
.chat 212
0.01%
0.38%
.sale 212
0.01%
1.49%
.computer 210
0.01%
2.26%
.engineering 210
0.01%
1.89%
.beer 208
0.01%
0.11%
.catering 208
0.01%
6.9%
.ninja 207
0.01%
0.86%
.gratis 205
0.01%
6.69%
.kitchen 205
0.01%
2.74%
.holiday 204
0.01%
5.37%
.camp 202
0.01%
2.48%
.green 202
0.01%
2.42%
.style 197
0.01%
1.72%
.cards 196
0.01%
1.38%
.discount 196
0.01%
6%
.film 195
0.01%
2.73%
.repair 195
0.01%
2.31%
.pictures 194
0.01%
2.35%
.red 194
0.01%
1.07%
.versicherung 194
0.01%
15.71%
.report 193
0.01%
1.66%
.rentals 188
0.01%
1.48%
.domains 187
0.01%
2.54%

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.