asn.dev

Address space

AS2914 NTT-DATA-2914

Transit DROP-listed space ARIN

IPv4 prefixes 2,262 4.87M addresses
IPv6 prefixes 189
Most common size /24 IPv4
Flagged 270

Shape

IPv4 prefix sizes

All IPv4
/15
/15: 1
1
/16
/16: 15
15
/17
/17: 23
23
/18
/18: 52
52
/19
/19: 79
79
/20
/20: 99
99
/21
/21: 160
160
/22
/22: 311
311
/23
/23: 398
398
/24
/24: 905
905
/25
/25: 55
55
/26
/26: 50
50
/27
/27: 41
41
/28
/28: 37
37
/29
/29: 28
28
/30
/30: 4
4
/31
/31: 2
2
/32
/32: 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
/32
/32: 5
5
/34
/34: 2
2
/35
/35: 5
5
/36
/36: 5
5
/37
/37: 8
8
/38
/38: 12
12
/39
/39: 7
7
/40
/40: 9
9
/41
/41: 7
7
/42
/42: 8
8
/43
/43: 9
9
/44
/44: 9
9
/45
/45: 13
13
/46
/46: 11
11
/47
/47: 14
14
/48
/48: 14
14
/49
/49: 2
2
/50
/50: 2
2
/51
/51: 2
2
/52
/52: 2
2
/53
/53: 2
2
/54
/54: 2
2
/55
/55: 2
2
/56
/56: 2
2
/57
/57: 2
2
/58
/58: 1
1
/59
/59: 2
2
/60
/60: 2
2
/61
/61: 5
5
/62
/62: 5
5
/63
/63: 8
8
/64
/64: 10
10

Geography

Where the space lands

CountryNamePrefixes
USUnited States of America2,451

Review

Flagged prefixes

270 of 2,451
PrefixFamilyAddressesCountryFlags
61.58.34.128/25IPv4128USToo specific
61.120.148.128/25IPv4128USToo specific
61.200.80.0/25IPv4128USToo specific
61.200.80.128/28IPv416USToo specific
61.200.80.144/29IPv48USToo specific
61.200.80.152/29IPv48USToo specific
61.200.80.160/27IPv432USToo specific
61.200.80.192/26IPv464USToo specific
61.200.81.0/25IPv4128USToo specific
61.200.83.0/25IPv4128USToo specific
61.200.83.128/28IPv416USToo specific
61.200.83.160/27IPv432USToo specific
61.200.83.192/26IPv464USToo specific
62.73.169.0/27IPv432USToo specific
62.73.169.32/29IPv48USToo specific
62.73.169.56/29IPv48USToo specific
62.73.169.64/26IPv464USToo specific
62.73.169.128/25IPv4128USToo specific
81.20.67.0/27IPv432USToo specific
81.20.67.32/28IPv416USToo specific
81.20.67.56/29IPv48USToo specific
81.20.67.64/26IPv464USToo specific
81.20.67.128/25IPv4128USToo specific
81.93.189.0/26IPv464USToo specific
81.93.189.72/29IPv48USToo 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.