asn.dev

Address space

AS36351 SOFTLAYER - IBM Cloud

Hosting DROP-listed space ARIN Content

IPv4 prefixes 906 3.64M addresses
IPv6 prefixes 72
Most common size /24 IPv4
Flagged 429

Shape

IPv4 prefix sizes

All IPv4
/14
/14: 1
1
/16
/16: 7
7
/17
/17: 25
25
/18
/18: 66
66
/19
/19: 62
62
/20
/20: 63
63
/21
/21: 59
59
/22
/22: 67
67
/23
/23: 62
62
/24
/24: 82
82
/25
/25: 49
49
/26
/26: 49
49
/27
/27: 50
50
/28
/28: 46
46
/29
/29: 55
55
/30
/30: 48
48
/31
/31: 53
53
/32
/32: 62
62

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
/33
/33: 1
1
/34
/34: 1
1
/36
/36: 4
4
/37
/37: 2
2
/38
/38: 2
2
/39
/39: 13
13
/40
/40: 11
11
/41
/41: 1
1
/42
/42: 1
1
/43
/43: 1
1
/44
/44: 1
1
/45
/45: 1
1
/46
/46: 1
1
/47
/47: 1
1
/48
/48: 14
14
/49
/49: 1
1
/50
/50: 1
1
/51
/51: 1
1
/52
/52: 1
1
/53
/53: 1
1
/54
/54: 1
1
/55
/55: 1
1
/56
/56: 1
1
/57
/57: 1
1
/58
/58: 1
1
/59
/59: 1
1
/60
/60: 1
1
/61
/61: 1
1
/62
/62: 1
1
/63
/63: 1
1
/64
/64: 2
2

Geography

Where the space lands

CountryNamePrefixes
USUnited States of America978

Review

Flagged prefixes

429 of 978
PrefixFamilyAddressesCountryFlags
50.97.16.0/25IPv4128USToo specific
50.97.16.128/27IPv432USToo specific
50.97.16.160/28IPv416USToo specific
50.97.16.176/29IPv48USToo specific
50.97.16.184/29IPv48USToo specific
50.97.16.192/26IPv464USToo specific
52.116.25.0/29IPv48USToo specific
52.116.25.8/29IPv48USToo specific
52.116.25.16/28IPv416USToo specific
52.116.25.32/27IPv432USToo specific
52.116.25.64/26IPv464USToo specific
52.116.25.128/25IPv4128USToo specific
52.116.160.0/25IPv4128USToo specific
52.116.160.128/27IPv432USToo specific
52.116.160.160/28IPv416USToo specific
52.116.160.176/29IPv48USToo specific
52.116.160.184/29IPv48USToo specific
52.116.160.192/26IPv464USToo specific
52.116.198.0/25IPv4128USToo specific
52.116.198.128/28IPv416USToo specific
52.116.198.144/29IPv48USToo specific
52.116.198.152/32IPv41USToo specific
52.116.198.153/32IPv41USToo specific
52.116.198.154/31IPv42USToo specific
52.116.198.156/30IPv44USToo 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.