asn.dev

Address space

AS5400 BT

Unclassified RIPE

IPv4 prefixes 77 713K addresses
IPv6 prefixes 55
Most common size /19 IPv4
Flagged 0

Shape

IPv4 prefix sizes

All IPv4
/16
/16: 5
5
/17
/17: 3
3
/18
/18: 6
6
/19
/19: 17
17
/20
/20: 4
4
/21
/21: 8
8
/22
/22: 7
7
/23
/23: 12
12
/24
/24: 15
15

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

IPv6 prefix sizes

All IPv6
/24
/24: 1
1
/25
/25: 3
3
/26
/26: 2
2
/27
/27: 2
2
/28
/28: 1
1
/29
/29: 3
3
/30
/30: 5
5
/31
/31: 4
4
/32
/32: 8
8
/33
/33: 1
1
/35
/35: 1
1
/36
/36: 3
3
/37
/37: 4
4
/38
/38: 5
5
/39
/39: 9
9
/40
/40: 3
3

Geography

Where the space lands

CountryNamePrefixes
GBUnited Kingdom132