AS7018
AT&T Services, Inc.
Carries both AT&T broadband and a large transit business, so the same ASN fronts consumer DSL, fibre and wholesale carriage. 12.0.0.0/8 is one of the original legacy allocations.
ISP — Residential eyeball network. Addresses here look like customers, because they are.
- Announced prefixes
- 6
- 5 IPv4 · 1 IPv6
- IPv4 addresses
- 19M
- across the blocks listed below
- Largest block
- /9
- smallest prefix length announced
- Registry
- ARIN
- ATT-INTERNET4
We hold inventory here
Our dedicated ISP addresses include subnets on this network. Take an address we issue, check it against the blocks below, and confirm it for yourself rather than taking the claim on faith.
ISP proxies →Announced ranges
The blocks AS7018 advertises to the rest of the internet in this snapshot. A production routing table carries more — large carriers de-aggregate for traffic engineering — so treat the totals as a floor.
Matched in your browser against the 6 blocks below. Nothing is sent anywhere.
IPv4 — 5 blocks
| Prefix | First address | Last address | Addresses |
|---|---|---|---|
| 12.0.0.0/9 | 12.0.0.0 | 12.127.255.255 | 8,388,608 |
| 76.192.0.0/10 | 76.192.0.0 | 76.255.255.255 | 4,194,304 |
| 99.0.0.0/12 | 99.0.0.0 | 99.15.255.255 | 1,048,576 |
| 107.192.0.0/12 | 107.192.0.0 | 107.207.255.255 | 1,048,576 |
| 108.192.0.0/10 | 108.192.0.0 | 108.255.255.255 | 4,194,304 |
IPv6 — 1 blocks
| Prefix | First address | Last address | Addresses |
|---|---|---|---|
| 2600:300::/24 | 2600:300:: | 2600:3ff:ffff:ffff:ffff:ffff:ffff:ffff | 2^104 |