Notable IP addresses

The addresses that show up in router settings, DNS leak tests, firewall logs and "ping 8.8.8.8". Each profile explains who runs the address, what it is for, and what a lookup will (and won't) tell you.

Public DNS resolvers

Google Public DNS (primary)

The most widely used public DNS resolver in the world. Anycast: the same address answers from Google data centres on …

Google Public DNS (secondary)

The secondary address of Google Public DNS. Identical service to 8.8.8.8, listed second in most configurations.

Cloudflare DNS (1.1.1.1)

Cloudflare's privacy-focused public resolver, launched 1 April 2018 in partnership with APNIC, which holds the 1.1.1.…

Cloudflare DNS (secondary)

Secondary address for Cloudflare's 1.1.1.1 resolver. Same servers, same privacy policy, fewer legacy-traffic problems…

A non-profit resolver that blocks known-malicious domains using threat feeds from ~20 security vendors. Operated unde…

149.112.112.112

Quad9 DNS (secondary)

Secondary address for Quad9's malware-blocking resolver.

OpenDNS / Cisco Umbrella

One of the oldest public resolvers (2006), now part of Cisco Umbrella. Offers optional content filtering through free…

OpenDNS (secondary)

Secondary OpenDNS resolver, paired with 208.67.222.222.

A free resolver that blocks ads, trackers and malware at the DNS level for every device on a network.

2001:4860:4860::8888

Google Public DNS (IPv6)

The IPv6 address of Google Public DNS, the counterpart to 8.8.8.8. Secondary: 2001:4860:4860::8844.

2606:4700:4700::1111

Cloudflare DNS (IPv6)

IPv6 address of the 1.1.1.1 resolver. Secondary: 2606:4700:4700::1001.

Private, loopback & special-purpose addresses

192.168.1.1 — default router address

The most common default gateway address for home routers. Type it into a browser to open the router admin page (Netge…

192.168.0.1 — default router address

The second most common router login address, used by many D-Link, TP-Link, Netgear cable modems and ISP-supplied gate…

10.0.0.1 — private gateway address

Default gateway for Comcast/Xfinity gateways, many Apple AirPort setups, Ubiquiti gear and corporate networks that us…

172.16.0.1 — private address (172.16/12)

First usable address of the 172.16.0.0/12 private block (172.16.0.0 – 172.31.255.255), the least-used of the three RF…

127.0.0.1 — localhost

The IPv4 loopback address. Traffic sent to 127.0.0.1 never leaves your device; it is how programs on the same machine…

0.0.0.0 — "any address"

A non-routable placeholder meaning "all IPv4 addresses on this host" (when a server binds to it) or "no address / unk…

255.255.255.255

255.255.255.255 — limited broadcast

The limited broadcast address: a packet sent here is delivered to every host on the local network segment and is neve…

169.254.x.x — link-local (APIPA) address

An address in 169.254.0.0/16 means the device could not get an IP from DHCP and assigned itself one. It is the classi…

169.254.169.254

169.254.169.254 — cloud instance metadata

The address where cloud virtual machines fetch their own metadata — instance ID, region, user-data and temporary IAM …

Get this data in your app

The same lookup is available as JSON from our IP Geolocation API — free for 1,000 requests a day, no credit card.

curl https://www.ipaddressdetails.com/api/v1/ip/8.8.8.8

API docs & free key →

Looking for networks instead?

Browse the ASN directory — Google, Cloudflare, AWS, residential ISPs and the hosting networks VPN providers use.