20i at a Glance
| Type | Web hosting company |
|---|---|
| Website | www.20i.com |
| Network (ASN) | AS48254 TWENTYI |
| Announced IP space | 24 IPv4 prefixes (~6,144 addresses), 14 IPv6 prefixes |
| Customer nameservers | ns1.stackdns.com, ns2.stackdns.com, ns3.stackdns.com, ns4.stackdns.com |
20i Nameservers
To host a domain with 20i, set these as the domain's nameservers at your registrar:
| Nameserver | IPv4 | Answered from network |
|---|---|---|
| ns1.stackdns.com | 35.197.225.59 | AS396982 Google LLC |
| ns2.stackdns.com | 146.148.28.88 | AS396982 Google LLC |
| ns3.stackdns.com | 35.198.79.191 | AS396982 Google LLC |
| ns4.stackdns.com | 104.196.137.209 | AS396982 Google LLC |
- Log in to the registrar where you bought the domain and open its DNS or nameserver settings.
- Choose custom nameservers and replace the current ones with the 20i nameservers above.
- Save, then wait: nameserver changes take up to 24–48 hours to spread. Follow it live with the DNS propagation checker or the NS lookup.
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20i IP Ranges and ASN
20i announces its address space from one autonomous system. Any website whose IP address falls in these ranges runs on 20i's network. Counts are from the global routing table on September 25, 2026.
| ASN | Registered name | Registry | IPv4 prefixes | IPv4 addresses | IPv6 prefixes |
|---|---|---|---|---|---|
| AS48254 | TWENTYI - 20i Limited, GB | ripencc · since 2018 | 24 | 6,144 | 14 |
Largest 20i IP blocks
45.8.224.0/2445.8.225.0/2445.8.226.0/2445.8.227.0/2446.247.89.0/2446.247.90.0/2446.247.91.0/24185.146.164.0/242a07:7800::/482a07:7800:1::/48Look up any address in these blocks with the IP lookup or the ASN lookup.
How to Check if a Website Is Hosted on 20i
Enter the domain in the checker at the top of this page. It names 20i when one or more of these signals match, and lists each one as evidence:
- The site's IP address is inside AS48254, the network 20i announces.
- The HTTP response carries an x-cdn-node-is-at-origin header.
- The domain uses 20i nameservers (stackdns.com). This shows where DNS is managed, which is usually but not always the host.
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20i FAQ
What are 20i's nameservers?
20i customers point their domain to ns1.stackdns.com, ns2.stackdns.com, ns3.stackdns.com, ns4.stackdns.com. Changes take up to 24–48 hours to spread through DNS.
What is 20i's ASN?
20i announces its IP addresses from AS48254 (TWENTYI, registered with RIPENCC).
How many IP addresses does 20i have?
As of September 25, 2026, 20i's network announces 24 IPv4 prefixes covering about 6,144 IPv4 addresses, plus 14 IPv6 prefixes (source: RIPEstat routing data).
How can I tell if a website is hosted on 20i?
Run the domain through the hosting checker on this page. It reports 20i when the site's IP address is inside AS48254, the network 20i announces, and it shows every matching signal as evidence.
Is 20i a web host or a CDN?
20i is a web hosting company: it provides shared, WordPress, white-label reseller (StackCP) and managed cloud hosting.
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20i is a trademark of its owner. DNS Robot is not affiliated with 20i unless an offer above is marked sponsored.