asn.dev

Address space

AS45903 CMCTELECOM-VN CMC Telecom Infrastructure Company

Residential APNIC

IPv4 prefixes 70 81.66K addresses
IPv6 prefixes 138
Most common size /22 IPv4
Flagged 6

Shape

IPv4 prefix sizes

All IPv4
/19
/19: 3
3
/20
/20: 3
3
/21
/21: 6
6
/22
/22: 19
19
/23
/23: 17
17
/24
/24: 16
16
/25
/25: 1
1
/26
/26: 1
1
/27
/27: 1
1
/28
/28: 1
1
/29
/29: 1
1
/30
/30: 1
1

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
/36
/36: 2
2
/37
/37: 2
2
/38
/38: 4
4
/39
/39: 4
4
/40
/40: 4
4
/41
/41: 19
19
/42
/42: 20
20
/43
/43: 17
17
/44
/44: 30
30
/45
/45: 7
7
/46
/46: 10
10
/47
/47: 10
10
/48
/48: 9
9

Geography

Where the space lands

CountryNamePrefixes
VNViet Nam208

Review

Flagged prefixes

6 of 208
PrefixFamilyAddressesCountryFlags
119.82.139.0/25IPv4128VNToo specific
119.82.139.128/26IPv464VNToo specific
119.82.139.192/29IPv48VNToo specific
119.82.139.204/30IPv44VNToo specific
119.82.139.208/28IPv416VNToo specific
119.82.139.224/27IPv432VNToo specific

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