asn.dev

Address space

AS7018 ATT-INTERNET4

IPv4 prefixes 7,563 89.29M addresses
IPv6 prefixes 103
Most common size /23 IPv4
Flagged 6

Shape

Prefix sizes

IPv4
/11
/11: 3
3
/12
/12: 15
15
/13
/13: 18
18
/14
/14: 40
40
/15
/15: 84
84
/16
/16: 145
145
/17
/17: 205
205
/18
/18: 408
408
/19
/19: 609
609
/20
/20: 900
900
/21
/21: 1,171
1,171
/22
/22: 1,302
1,302
/23
/23: 1,330
1,330
/24
/24: 1,327
1,327
/25
/25: 2
2
/26
/26: 1
1
/27
/27: 1
1
/28
/28: 1
1
/29
/29: 1
1

How this network carves its IPv4 space. A wall of /24s usually means many small customer assignments or fine-grained traffic engineering; a few short prefixes means large contiguous allocations announced whole.

Shape

Prefix sizes

IPv6
/24
/24: 1
1
/25
/25: 1
1
/26
/26: 1
1
/27
/27: 1
1
/28
/28: 2
2
/29
/29: 8
8
/30
/30: 2
2
/31
/31: 6
6
/32
/32: 10
10
/33
/33: 3
3
/34
/34: 3
3
/35
/35: 2
2
/36
/36: 5
5
/37
/37: 5
5
/38
/38: 5
5
/39
/39: 7
7
/40
/40: 8
8
/41
/41: 3
3
/42
/42: 2
2
/43
/43: 2
2
/44
/44: 4
4
/45
/45: 2
2
/46
/46: 6
6
/47
/47: 2
2
/48
/48: 12
12

Geography

Where the space lands

CountryNamePrefixes
USUnited States of America7,666

Review

Flagged prefixes

6 of 7,666
PrefixFamilyAddressesCountryFlags
12.13.176.0/25IPv4128USToo specific
12.229.60.0/29IPv48USToo specific
12.229.60.16/28IPv416USToo specific
12.229.60.32/27IPv432USToo specific
12.229.60.64/26IPv464USToo specific
12.229.60.128/25IPv4128USToo specific

A flag is an observation, not an accusation. Very large and very specific prefixes are both legitimate in the right context.

Inventory

All prefixes

showing 400 of 7,666
PrefixFamilyAddressesCountryFlags
12.0.4.0/22IPv41,024US
12.0.8.0/21IPv42,048US
12.0.16.0/20IPv44,096US
12.0.32.0/19IPv48,192US
12.0.64.0/19IPv48,192US
12.0.96.0/20IPv44,096US
12.0.112.0/21IPv42,048US
12.0.121.0/24IPv4256US
12.0.122.0/23IPv4512US
12.0.124.0/23IPv4512US
12.0.128.0/18IPv416,384US
12.0.192.0/19IPv48,192US
12.0.232.0/21IPv42,048US
12.0.240.0/20IPv44,096US
12.1.0.0/22IPv41,024US
12.1.4.0/24IPv4256US
12.1.6.0/23IPv4512US
12.1.8.0/21IPv42,048US
12.1.16.0/20IPv44,096US
12.1.32.0/20IPv44,096US
12.1.51.0/24IPv4256US
12.1.52.0/22IPv41,024US
12.1.56.0/21IPv42,048US
12.1.64.0/20IPv44,096US
12.1.80.0/21IPv42,048US
12.1.89.0/24IPv4256US
12.1.90.0/23IPv4512US
12.1.92.0/22IPv41,024US
12.1.97.0/24IPv4256US
12.1.98.0/23IPv4512US
12.1.100.0/22IPv41,024US
12.1.104.0/21IPv42,048US
12.1.112.0/20IPv44,096US
12.1.128.0/17IPv432,768US
12.2.0.0/21IPv42,048US
12.2.8.0/22IPv41,024US
12.2.13.0/24IPv4256US
12.2.14.0/23IPv4512US
12.2.16.0/20IPv44,096US
12.2.32.0/23IPv4512US
12.2.34.0/24IPv4256US
12.2.36.0/22IPv41,024US
12.2.40.0/21IPv42,048US
12.2.48.0/20IPv44,096US
12.2.64.0/18IPv416,384US
12.2.128.0/21IPv42,048US
12.2.136.0/22IPv41,024US
12.2.140.0/23IPv4512US
12.2.143.0/24IPv4256US
12.2.144.0/20IPv44,096US
12.2.160.0/21IPv42,048US
12.2.168.0/24IPv4256US
12.2.170.0/23IPv4512US
12.2.172.0/22IPv41,024US
12.2.177.0/24IPv4256US
12.2.178.0/23IPv4512US
12.2.180.0/22IPv41,024US
12.2.184.0/21IPv42,048US
12.2.192.0/18IPv416,384US
12.3.0.0/19IPv48,192US
12.3.34.0/23IPv4512US
12.3.36.0/22IPv41,024US
12.3.41.0/24IPv4256US
12.3.42.0/23IPv4512US
12.3.44.0/22IPv41,024US
12.3.48.0/20IPv44,096US
12.3.64.0/24IPv4256US
12.3.66.0/23IPv4512US
12.3.68.0/22IPv41,024US
12.3.72.0/21IPv42,048US
12.3.80.0/20IPv44,096US
12.3.96.0/20IPv44,096US
12.3.112.0/22IPv41,024US
12.3.116.0/23IPv4512US
12.3.118.0/24IPv4256US
12.3.120.0/21IPv42,048US
12.3.128.0/19IPv48,192US
12.3.160.0/22IPv41,024US
12.3.164.0/23IPv4512US
12.3.166.0/24IPv4256US
12.3.168.0/21IPv42,048US
12.3.176.0/20IPv44,096US
12.3.192.0/20IPv44,096US
12.3.208.0/22IPv41,024US
12.3.214.0/23IPv4512US
12.3.216.0/22IPv41,024US
12.3.220.0/23IPv4512US
12.3.222.0/24IPv4256US
12.3.224.0/19IPv48,192US
12.4.0.0/20IPv44,096US
12.4.16.0/21IPv42,048US
12.4.24.0/23IPv4512US
12.4.28.0/22IPv41,024US
12.4.32.0/19IPv48,192US
12.4.64.0/18IPv416,384US
12.4.128.0/19IPv48,192US
12.4.160.0/22IPv41,024US
12.4.165.0/24IPv4256US
12.4.166.0/23IPv4512US
12.4.168.0/21IPv42,048US
12.4.176.0/20IPv44,096US
12.4.192.0/19IPv48,192US
12.4.224.0/20IPv44,096US
12.4.240.0/22IPv41,024US
12.4.244.0/24IPv4256US
12.4.246.0/23IPv4512US
12.4.248.0/21IPv42,048US
12.5.0.0/22IPv41,024US
12.5.4.0/23IPv4512US
12.5.6.0/24IPv4256US
12.5.8.0/21IPv42,048US
12.5.16.0/20IPv44,096US
12.5.32.0/19IPv48,192US
12.5.64.0/19IPv48,192US
12.5.96.0/20IPv44,096US
12.5.112.0/21IPv42,048US
12.5.120.0/22IPv41,024US
12.5.125.0/24IPv4256US
12.5.126.0/23IPv4512US
12.5.128.0/22IPv41,024US
12.5.132.0/24IPv4256US
12.5.135.0/24IPv4256US
12.5.136.0/21IPv42,048US
12.5.144.0/20IPv44,096US
12.5.160.0/24IPv4256US
12.5.164.0/22IPv41,024US
12.5.168.0/21IPv42,048US
12.5.176.0/21IPv42,048US
12.5.184.0/23IPv4512US
12.5.188.0/22IPv41,024US
12.5.192.0/21IPv42,048US
12.5.200.0/24IPv4256US
12.5.202.0/23IPv4512US
12.5.204.0/22IPv41,024US
12.5.208.0/20IPv44,096US
12.5.224.0/19IPv48,192US
12.6.0.0/21IPv42,048US
12.6.8.0/24IPv4256US
12.6.10.0/23IPv4512US
12.6.12.0/22IPv41,024US
12.6.17.0/24IPv4256US
12.6.18.0/23IPv4512US
12.6.20.0/24IPv4256US
12.6.22.0/23IPv4512US
12.6.24.0/21IPv42,048US
12.6.32.0/19IPv48,192US
12.6.64.0/20IPv44,096US
12.6.80.0/21IPv42,048US
12.6.88.0/24IPv4256US
12.6.90.0/23IPv4512US
12.6.92.0/22IPv41,024US
12.6.96.0/20IPv44,096US
12.6.112.0/24IPv4256US
12.6.114.0/23IPv4512US
12.6.116.0/22IPv41,024US
12.6.120.0/21IPv42,048US
12.6.128.0/21IPv42,048US
12.6.137.0/24IPv4256US
12.6.138.0/23IPv4512US
12.6.140.0/22IPv41,024US
12.6.144.0/20IPv44,096US
12.6.160.0/20IPv44,096US
12.6.176.0/23IPv4512US
12.6.179.0/24IPv4256US
12.6.180.0/22IPv41,024US
12.6.184.0/21IPv42,048US
12.6.192.0/18IPv416,384US
12.7.0.0/20IPv44,096US
12.7.16.0/21IPv42,048US
12.7.24.0/22IPv41,024US
12.7.28.0/23IPv4512US
12.7.30.0/24IPv4256US
12.7.32.0/19IPv48,192US
12.7.64.0/18IPv416,384US
12.7.128.0/21IPv42,048US
12.7.136.0/22IPv41,024US
12.7.140.0/23IPv4512US
12.7.144.0/21IPv42,048US
12.7.153.0/24IPv4256US
12.7.154.0/23IPv4512US
12.7.156.0/22IPv41,024US
12.7.161.0/24IPv4256US
12.7.162.0/23IPv4512US
12.7.164.0/22IPv41,024US
12.7.168.0/21IPv42,048US
12.7.176.0/20IPv44,096US
12.7.194.0/23IPv4512US
12.7.196.0/22IPv41,024US
12.7.201.0/24IPv4256US
12.7.202.0/23IPv4512US
12.7.204.0/22IPv41,024US
12.7.208.0/20IPv44,096US
12.7.224.0/19IPv48,192US
12.8.0.0/19IPv48,192US
12.8.32.0/20IPv44,096US
12.8.48.0/22IPv41,024US
12.8.52.0/23IPv4512US
12.8.55.0/24IPv4256US
12.8.56.0/23IPv4512US
12.8.58.0/24IPv4256US
12.8.60.0/22IPv41,024US
12.8.64.0/19IPv48,192US
12.8.97.0/24IPv4256US
12.8.98.0/23IPv4512US
12.8.100.0/22IPv41,024US
12.8.104.0/22IPv41,024US
12.8.108.0/23IPv4512US
12.8.111.0/24IPv4256US
12.8.112.0/20IPv44,096US
12.8.128.0/18IPv416,384US
12.8.192.0/19IPv48,192US
12.8.224.0/20IPv44,096US
12.8.240.0/21IPv42,048US
12.8.248.0/22IPv41,024US
12.8.252.0/24IPv4256US
12.8.254.0/23IPv4512US
12.9.0.0/20IPv44,096US
12.9.16.0/21IPv42,048US
12.9.24.0/22IPv41,024US
12.9.28.0/24IPv4256US
12.9.30.0/23IPv4512US
12.9.32.0/21IPv42,048US
12.9.42.0/23IPv4512US
12.9.44.0/22IPv41,024US
12.9.48.0/20IPv44,096US
12.9.64.0/19IPv48,192US
12.9.96.0/20IPv44,096US
12.9.112.0/22IPv41,024US
12.9.116.0/23IPv4512US
12.9.120.0/21IPv42,048US
12.9.128.0/21IPv42,048US
12.9.140.0/22IPv41,024US
12.9.144.0/22IPv41,024US
12.9.148.0/23IPv4512US
12.9.151.0/24IPv4256US
12.9.152.0/21IPv42,048US
12.9.160.0/19IPv48,192US
12.9.192.0/20IPv44,096US
12.9.208.0/24IPv4256US
12.9.210.0/23IPv4512US
12.9.212.0/22IPv41,024US
12.9.216.0/21IPv42,048US
12.9.224.0/21IPv42,048US
12.9.232.0/22IPv41,024US
12.9.236.0/23IPv4512US
12.9.240.0/20IPv44,096US
12.10.0.0/19IPv48,192US
12.10.34.0/23IPv4512US
12.10.36.0/22IPv41,024US
12.10.40.0/21IPv42,048US
12.10.48.0/20IPv44,096US
12.10.64.0/20IPv44,096US
12.10.80.0/22IPv41,024US
12.10.84.0/23IPv4512US
12.10.86.0/24IPv4256US
12.10.88.0/21IPv42,048US
12.10.96.0/22IPv41,024US
12.10.100.0/23IPv4512US
12.10.103.0/24IPv4256US
12.10.104.0/23IPv4512US
12.10.106.0/24IPv4256US
12.10.109.0/24IPv4256US
12.10.110.0/23IPv4512US
12.10.112.0/23IPv4512US
12.10.114.0/24IPv4256US
12.10.116.0/23IPv4512US
12.10.119.0/24IPv4256US
12.10.120.0/21IPv42,048US
12.10.128.0/18IPv416,384US
12.10.192.0/20IPv44,096US
12.10.208.0/21IPv42,048US
12.10.216.0/23IPv4512US
12.10.218.0/24IPv4256US
12.10.220.0/22IPv41,024US
12.10.224.0/19IPv48,192US
12.11.0.0/18IPv416,384US
12.11.64.0/19IPv48,192US
12.11.96.0/20IPv44,096US
12.11.112.0/23IPv4512US
12.11.114.0/24IPv4256US
12.11.116.0/22IPv41,024US
12.11.120.0/21IPv42,048US
12.11.128.0/20IPv44,096US
12.11.144.0/22IPv41,024US
12.11.152.0/21IPv42,048US
12.11.160.0/19IPv48,192US
12.11.192.0/20IPv44,096US
12.11.208.0/22IPv41,024US
12.11.212.0/23IPv4512US
12.11.214.0/24IPv4256US
12.11.216.0/21IPv42,048US
12.11.224.0/19IPv48,192US
12.12.4.0/22IPv41,024US
12.12.8.0/21IPv42,048US
12.12.16.0/20IPv44,096US
12.12.32.0/20IPv44,096US
12.12.48.0/21IPv42,048US
12.12.56.0/22IPv41,024US
12.12.60.0/24IPv4256US
12.12.62.0/23IPv4512US
12.12.64.0/18IPv416,384US
12.12.128.0/20IPv44,096US
12.12.144.0/21IPv42,048US
12.12.152.0/22IPv41,024US
12.12.156.0/24IPv4256US
12.12.158.0/23IPv4512US
12.12.160.0/19IPv48,192US
12.12.192.0/18IPv416,384US
12.13.0.0/21IPv42,048US
12.13.8.0/23IPv4512US
12.13.11.0/24IPv4256US
12.13.12.0/22IPv41,024US
12.13.16.0/20IPv44,096US
12.13.32.0/23IPv4512US
12.13.34.0/24IPv4256US
12.13.36.0/22IPv41,024US
12.13.48.0/23IPv4512US
12.13.51.0/24IPv4256US
12.13.52.0/23IPv4512US
12.13.56.0/21IPv42,048US
12.13.64.0/22IPv41,024US
12.13.68.0/24IPv4256US
12.13.74.0/23IPv4512US
12.13.76.0/22IPv41,024US
12.13.80.0/20IPv44,096US
12.13.96.0/19IPv48,192US
12.13.128.0/19IPv48,192US
12.13.160.0/21IPv42,048US
12.13.168.0/22IPv41,024US
12.13.172.0/24IPv4256US
12.13.174.0/23IPv4512US
12.13.176.0/25IPv4128USToo specific
12.13.177.0/24IPv4256US
12.13.178.0/23IPv4512US
12.13.180.0/22IPv41,024US
12.13.184.0/21IPv42,048US
12.13.192.0/20IPv44,096US
12.13.208.0/23IPv4512US
12.13.211.0/24IPv4256US
12.13.212.0/22IPv41,024US
12.13.216.0/21IPv42,048US
12.13.224.0/21IPv42,048US
12.13.232.0/24IPv4256US
12.13.234.0/23IPv4512US
12.13.236.0/22IPv41,024US
12.13.240.0/21IPv42,048US
12.13.248.0/22IPv41,024US
12.13.252.0/23IPv4512US
12.13.254.0/24IPv4256US
12.14.0.0/21IPv42,048US
12.14.8.0/22IPv41,024US
12.14.13.0/24IPv4256US
12.14.15.0/24IPv4256US
12.14.16.0/20IPv44,096US
12.14.32.0/19IPv48,192US
12.14.64.0/20IPv44,096US
12.14.80.0/21IPv42,048US
12.14.89.0/24IPv4256US
12.14.90.0/23IPv4512US
12.14.92.0/22IPv41,024US
12.14.96.0/19IPv48,192US
12.14.128.0/20IPv44,096US
12.14.144.0/23IPv4512US
12.14.146.0/24IPv4256US
12.14.148.0/22IPv41,024US
12.14.153.0/24IPv4256US
12.14.154.0/23IPv4512US
12.14.156.0/24IPv4256US
12.14.158.0/23IPv4512US
12.14.160.0/21IPv42,048US
12.14.168.0/23IPv4512US
12.14.171.0/24IPv4256US
12.14.172.0/22IPv41,024US
12.14.176.0/20IPv44,096US
12.14.192.0/20IPv44,096US
12.14.208.0/21IPv42,048US
12.14.216.0/24IPv4256US
12.14.218.0/23IPv4512US
12.14.220.0/22IPv41,024US
12.14.225.0/24IPv4256US
12.14.226.0/23IPv4512US
12.14.228.0/22IPv41,024US
12.14.236.0/22IPv41,024US
12.14.240.0/22IPv41,024US
12.14.244.0/23IPv4512US
12.14.247.0/24IPv4256US
12.14.248.0/21IPv42,048US
12.15.0.0/22IPv41,024US
12.15.4.0/23IPv4512US
12.15.8.0/21IPv42,048US
12.15.16.0/21IPv42,048US
12.15.24.0/22IPv41,024US
12.15.29.0/24IPv4256US
12.15.30.0/23IPv4512US
12.15.32.0/21IPv42,048US
12.15.41.0/24IPv4256US
12.15.42.0/23IPv4512US
12.15.44.0/22IPv41,024US
12.15.48.0/24IPv4256US
12.15.50.0/23IPv4512US

Capped at 400 rows to keep the page a sane size. The filter searches only what is rendered.