asn.dev

Address space

AS49 US-NATIONAL-INSTITUTE-OF-STANDARDS-AND-TECHNOLOGY

Unclassified ARIN

IPv4 prefixes 12 65.54K addresses
IPv6 prefixes 5
Most common size /23 IPv4
Flagged 0

Shape

IPv4 prefix sizes

All IPv4
/17
/17: 1
1
/18
/18: 1
1
/19
/19: 1
1
/21
/21: 2
2
/22
/22: 2
2
/23
/23: 3
3
/24
/24: 2
2

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
/37
/37: 1
1
/47
/47: 2
2
/48
/48: 2
2

Geography

Where the space lands

CountryNamePrefixes
USUnited States of America17