asn.dev

Address space

AS1909 CAIDA

Unclassified ARIN Educational/Research

IPv4 prefixes 76 147 addresses
IPv6 prefixes 1
Most common size /32 IPv4
Flagged 76

Shape

IPv4 prefix sizes

All IPv4
/29
/29: 4
4
/30
/30: 5
5
/31
/31: 28
28
/32
/32: 39
39

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

Geography

Where the space lands

CountryNamePrefixes
USUnited States of America77

Review

Flagged prefixes

76 of 77
PrefixFamilyAddressesCountryFlags
192.172.226.0/31IPv42USToo specific
192.172.226.8/32IPv41USToo specific
192.172.226.14/32IPv41USToo specific
192.172.226.23/32IPv41USToo specific
192.172.226.25/32IPv41USToo specific
192.172.226.27/32IPv41USToo specific
192.172.226.28/32IPv41USToo specific
192.172.226.37/32IPv41USToo specific
192.172.226.39/32IPv41USToo specific
192.172.226.42/31IPv42USToo specific
192.172.226.44/31IPv42USToo specific
192.172.226.48/32IPv41USToo specific
192.172.226.53/32IPv41USToo specific
192.172.226.55/32IPv41USToo specific
192.172.226.56/31IPv42USToo specific
192.172.226.58/32IPv41USToo specific
192.172.226.61/32IPv41USToo specific
192.172.226.62/31IPv42USToo specific
192.172.226.66/31IPv42USToo specific
192.172.226.69/32IPv41USToo specific
192.172.226.70/31IPv42USToo specific
192.172.226.74/31IPv42USToo specific
192.172.226.76/31IPv42USToo specific
192.172.226.80/31IPv42USToo specific
192.172.226.84/32IPv41USToo specific

The first 25. Every flag also shows in the IPv4 and IPv6 lists.

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