asn.dev

Address space

AS52 UCLA

Unclassified ARIN

IPv4 prefixes 29 329K addresses
IPv6 prefixes 102
Most common size /24 IPv4
Flagged 88

Shape

IPv4 prefix sizes

All IPv4
/16
/16: 4
4
/17
/17: 1
1
/18
/18: 1
1
/20
/20: 2
2
/21
/21: 3
3
/22
/22: 1
1
/23
/23: 1
1
/24
/24: 6
6
/25
/25: 1
1
/26
/26: 1
1
/27
/27: 1
1
/28
/28: 1
1
/29
/29: 1
1
/30
/30: 3
3
/31
/31: 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
/33
/33: 1
1
/34
/34: 1
1
/35
/35: 1
1
/36
/36: 1
1
/37
/37: 1
1
/38
/38: 1
1
/39
/39: 1
1
/41
/41: 2
2
/42
/42: 2
2
/43
/43: 2
2
/44
/44: 2
2
/45
/45: 2
2
/46
/46: 2
2
/47
/47: 2
2
/48
/48: 3
3
/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: 1
1
/65
/65: 1
1
/66
/66: 1
1
/67
/67: 1
1
/68
/68: 1
1
/69
/69: 1
1
/70
/70: 1
1
/71
/71: 1
1
/72
/72: 1
1
/73
/73: 1
1
/74
/74: 1
1
/75
/75: 1
1
/76
/76: 1
1
/77
/77: 1
1
/78
/78: 1
1
/79
/79: 1
1
/80
/80: 1
1
/81
/81: 1
1
/82
/82: 1
1
/83
/83: 1
1
/84
/84: 1
1
/85
/85: 1
1
/86
/86: 1
1
/87
/87: 1
1
/88
/88: 1
1
/89
/89: 1
1
/90
/90: 1
1
/91
/91: 1
1
/92
/92: 1
1
/93
/93: 1
1
/94
/94: 1
1
/95
/95: 1
1
/96
/96: 1
1
/97
/97: 1
1
/98
/98: 1
1
/99
/99: 1
1
/100
/100: 1
1
/101
/101: 1
1
/102
/102: 1
1
/103
/103: 1
1
/104
/104: 1
1
/105
/105: 1
1
/106
/106: 1
1
/107
/107: 1
1
/108
/108: 1
1
/109
/109: 1
1
/110
/110: 1
1
/111
/111: 1
1
/112
/112: 1
1
/113
/113: 1
1
/114
/114: 1
1
/115
/115: 1
1
/116
/116: 1
1
/117
/117: 1
1
/118
/118: 1
1
/119
/119: 1
1
/120
/120: 1
1
/121
/121: 1
1
/122
/122: 2
2
/123
/123: 3
3

Geography

Where the space lands

CountryNamePrefixes
USUnited States of America131

Review

Flagged prefixes

88 of 131
PrefixFamilyAddressesCountryFlags
137.164.24.124/31IPv42USToo specific
137.164.24.134/31IPv42USToo specific
137.164.24.220/30IPv44USToo specific
169.232.34.0/27IPv432USToo specific
169.232.34.32/28IPv416USToo specific
169.232.34.48/30IPv44USToo specific
169.232.34.52/30IPv44USToo specific
169.232.34.56/29IPv48USToo specific
169.232.34.64/26IPv464USToo specific
169.232.34.128/25IPv4128USToo specific
2607:f010:3fe::/63IPv6/63USToo specific
2607:f010:3fe:2::/64IPv6/64USToo specific
2607:f010:3fe:3::/89IPv6/89USToo specific
2607:f010:3fe:3:0:80::/90IPv6/90USToo specific
2607:f010:3fe:3:0:c0::/91IPv6/91USToo specific
2607:f010:3fe:3:0:e0::/92IPv6/92USToo specific
2607:f010:3fe:3:0:f0::/93IPv6/93USToo specific
2607:f010:3fe:3:0:f8::/94IPv6/94USToo specific
2607:f010:3fe:3:0:fc::/95IPv6/95USToo specific
2607:f010:3fe:3:0:fe::/96IPv6/96USToo specific
2607:f010:3fe:3:0:ff::/97IPv6/97USToo specific
2607:f010:3fe:3:0:ff:8000:0/98IPv6/98USToo specific
2607:f010:3fe:3:0:ff:c000:0/99IPv6/99USToo specific
2607:f010:3fe:3:0:ff:e000:0/100IPv6/100USToo specific
2607:f010:3fe:3:0:ff:f000:0/101IPv6/101USToo 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.