asn.dev

Address space

AS37918 ECL-INET - NTT, Inc.

Unclassified APNIC

IPv4 prefixes 10 69.38K addresses
IPv6 prefixes 1
Most common size /24 IPv4
Flagged 5

Shape

IPv4 prefix sizes

All IPv4
/16
/16: 1
1
/21
/21: 1
1
/22
/22: 1
1
/24
/24: 2
2
/25
/25: 1
1
/26
/26: 1
1
/27
/27: 1
1
/28
/28: 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
/48
/48: 1
1

Geography

Where the space lands

CountryNamePrefixes
JPJapan11

Review

Flagged prefixes

5 of 11
PrefixFamilyAddressesCountryFlags
192.68.248.0/28IPv416JPToo specific
192.68.248.16/28IPv416JPToo specific
192.68.248.32/27IPv432JPToo specific
192.68.248.64/26IPv464JPToo specific
192.68.248.128/25IPv4128JPToo specific

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