asn.dev

Address space

AS2856 BT-UK-AS BTnet UK Regional network

Residential DROP-listed space RIPE NSP

IPv4 prefixes 546 13.85M addresses
IPv6 prefixes 5
Most common size /24 IPv4
Flagged 0

Shape

IPv4 prefix sizes

All IPv4
/10
/10: 1
1
/11
/11: 1
1
/12
/12: 1
1
/13
/13: 3
3
/14
/14: 5
5
/15
/15: 10
10
/16
/16: 18
18
/17
/17: 9
9
/18
/18: 14
14
/19
/19: 29
29
/20
/20: 29
29
/21
/21: 33
33
/22
/22: 91
91
/23
/23: 66
66
/24
/24: 236
236

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
/25
/25: 1
1
/29
/29: 1
1
/47
/47: 1
1
/48
/48: 2
2

Geography

Where the space lands

CountryNamePrefixes
GBUnited Kingdom551