asn.dev

Address space

AS17621 CNCGROUP-SH China Unicom Shanghai network

Unclassified APNIC

IPv4 prefixes 408 806K addresses
IPv6 prefixes 416
Most common size /24 IPv4
Flagged 0

Shape

IPv4 prefix sizes

All IPv4
/17
/17: 1
1
/18
/18: 8
8
/19
/19: 23
23
/20
/20: 42
42
/21
/21: 64
64
/22
/22: 76
76
/23
/23: 91
91
/24
/24: 103
103

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
/30
/30: 1
1
/31
/31: 4
4
/32
/32: 5
5
/33
/33: 6
6
/34
/34: 4
4
/35
/35: 7
7
/36
/36: 7
7
/37
/37: 18
18
/38
/38: 21
21
/39
/39: 24
24
/40
/40: 54
54
/41
/41: 26
26
/42
/42: 90
90
/43
/43: 62
62
/44
/44: 51
51
/45
/45: 9
9
/46
/46: 8
8
/47
/47: 10
10
/48
/48: 9
9

Geography

Where the space lands

CountryNamePrefixes
CNChina824