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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
.luxury 72
0%
1.73%
.rent 72
0%
0.71%
.toys 72
0%
1.34%
.investments 73
0%
1%
.reviews 73
0%
0.66%
.associates 74
0%
2.01%
.garden 75
0%
0.04%
.reise 75
0%
8.78%
.accountants 76
0%
4.71%
.pics 77
0%
0.07%
.supplies 77
0%
2.83%
.dating 78
0%
1.81%
.insure 78
0%
1.24%
.menu 78
0%
1.42%
.theater 78
0%
5.54%
.cleaning 79
0%
3.28%
.racing 79
0%
1.74%
.black 83
0.01%
1.39%
.glass 83
0.01%
2.33%
.attorney 84
0.01%
1.8%
.vacations 86
0.01%
1.79%
.codes 88
0.01%
0.45%
.moe 89
0.01%
0.52%
.build 91
0.01%
0.78%
.tattoo 92
0.01%
1.2%
.ski 93
0.01%
1.46%
.tennis 94
0.01%
4.92%
.rip 95
0.01%
0.86%
.trade 95
0.01%
0.39%
.engineer 96
0.01%
1.26%
.hosting 96
0.01%
4.21%
.place 99
0.01%
0.96%
.shoes 100
0.01%
2.67%
.fish 102
0.01%
1.75%
.miami 102
0.01%
0.85%
.supply 102
0.01%
1.31%
.gold 104
0.01%
0.69%
.press 104
0.01%
0.56%
.shopping 105
0.01%
1.41%
.physio 107
0.01%
11.37%
.quebec 107
0.01%
1.49%
.cash 108
0.01%
0.55%
.auction 109
0.01%
1.94%
.tienda 109
0.01%
5.57%
.uno 110
0.01%
0.36%
.vegas 110
0.01%
0.97%
.equipment 111
0.01%
2.6%
.page 111
0.01%
0.29%
.science 113
0.01%
0.97%
.ist 115
0.01%
1.5%
.doctor 116
0.01%
1.38%
.apartments 118
0.01%
2.92%
.watch 118
0.01%
0.85%
.contractors 120
0.01%
3.43%
.surf 122
0.01%
0.15%
.dentist 123
0.01%
4.78%
.healthcare 123
0.01%
1.36%
.exchange 129
0.01%
0.71%
.bet 131
0.01%
0.07%
.careers 133
0.01%
1.42%
.fund 140
0.01%
0.63%
.credit 142
0.01%
2.55%
.fyi 143
0.01%
0.23%
.parts 143
0.01%
1.93%
.football 144
0.01%
2.27%
.archi 145
0.01%
3.69%
.delivery 149
0.01%
1.06%
.industries 150
0.01%
2.09%
.deals 153
0.01%
1.69%
.ink 159
0.01%
0.12%
.blue 162
0.01%
1.08%
.money 164
0.01%
0.76%
.holdings 166
0.01%
1.83%
.pizza 167
0.01%
1.67%
.alsace 168
0.01%
7.3%
.wedding 173
0.01%
1.43%
.construction 179
0.01%
1.9%
.university 179
0.01%
2.24%
.casa 180
0.01%
0.21%
.enterprises 182
0.01%
1.82%
.graphics 185
0.01%
3.45%
.domains 187
0.01%
2.54%
.rentals 188
0.01%
1.48%
.report 193
0.01%
1.66%
.pictures 194
0.01%
2.35%
.red 194
0.01%
1.07%
.versicherung 194
0.01%
15.71%
.film 195
0.01%
2.73%
.repair 195
0.01%
2.31%
.cards 196
0.01%
1.38%
.discount 196
0.01%
6%
.style 197
0.01%
1.72%
.camp 202
0.01%
2.48%
.green 202
0.01%
2.42%
.holiday 204
0.01%
5.37%
.gratis 205
0.01%
6.69%
.kitchen 205
0.01%
2.74%
.ninja 207
0.01%
0.86%
.beer 208
0.01%
0.11%
.catering 208
0.01%
6.9%

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.