What is my internet provider?
Anthropic, PBC
AS16509 Columbus, Ohio, United States
216.73.216.229 Network
- Anthropic, PBC Provider
The organisation that registered your address range. Resellers and mobile groups often register under a parent company's name, so this is not always the company you pay.
- AS16509 AS number
The autonomous system number: your provider's identity in the internet's global routing table. Every network that exchanges routes has one, and it is the most reliable way to say who owns an address.
- Data centre Network type
Whether the address belongs to a home connection, a data centre, or a network that exists to relay traffic. This is a heuristic, not a certainty.
- Looking up… Hostname
The name your address resolves to in reverse DNS, if the network operator published one. Plenty do not.
Connection
- HTTP/2 Protocol
The HTTP version your browser and this server agreed on. HTTP/3 runs over QUIC and is the newest of the three.
- TLSv1.3 TLS
The version of transport encryption protecting this connection. TLS 1.3 is current; anything below 1.2 is obsolete.
- IPv4 IP version
IPv4 addresses are four numbers; IPv6 addresses are eight groups of hexadecimal digits. Both run at the same time and your browser picks whichever both ends support.
- Columbus Served from
The Cloudflare data centre that served this page. It is the closest one on the network, which is not always the closest one geographically.
Your internet provider is the network that carries your traffic to the rest of the internet and the organisation that holds the address you are using. The values above identify it two ways: by the name registered against your address block, and by its AS number.
Why the name may surprise you
The name shown is whoever registered the address range, and that is not always the company you pay:
- Resellers operate under their own brand while using a larger network’s addresses.
- Mobile operators frequently register their consumer blocks to a parent group.
- Corporate and campus networks show the organisation, not the upstream carrier.
- VPNs and proxies show the data centre they rent from.
If the name looks unfamiliar, searching for the AS number will usually explain the relationship in one step.
What your provider can see
Even with everything encrypted, your provider necessarily knows:
- every IP address you connect to, and when;
- how much data moves in each direction;
- which domain names you resolve, unless you use DNS over HTTPS or DNS over TLS.
HTTPS protects the contents of the page and the specific path you requested. It does not hide that the connection happened. In several countries this connection metadata is retained for a legally mandated period.
Changing what is shown here
Restarting a router usually yields a different address from the same provider — the name above does not change. Only routing your traffic through another network changes it: a VPN, the Tor network, or a different provider entirely.
Frequently asked questions
Why does it name a company I have never heard of?
Smaller providers rent addresses from larger networks, and resellers often operate under a brand different from the network that owns the block. The name shown is whoever registered the address range.
What is the AS number for?
It identifies the network on the global routing table. Every network that exchanges routes on the internet has one, and it is the most reliable way to say which operator an address belongs to.
Can my ISP see which websites I visit?
It sees which servers you connect to and, unless you use encrypted DNS, which domains you look up. HTTPS hides the page and its contents; it does not hide the destination.
Does changing my provider change my IP address?
Yes — a new provider means an address from that provider's own blocks. Restarting your router usually gets you a different address from the same provider, which changes nothing that matters.