AS7377 University of California, San Diego

UCSD - University of California, San Diego · registered in the United States

IPv4 addresses12,126,474781 prefixes · 0.387% of announced IPv4

Rank in United States#19largest network in US by IPv4 space, of 18,338 · 0.89% of US

Rank worldwide#38of 79,396 networks with IPv4

IPv61 x /32 (81,919 x /48)34 prefixes

CountryUnited States18,679 ASNs registered there

Open AS7377 in ASN lookup Look up an IP in this network (44.0.0.1) All networks in United States

IPv4 prefixes

First 500 of 781 prefixes, in address order.

44.0.0.0/16
44.1.0.0/24
44.1.4.0/22
44.1.9.0/24
44.1.11.0/24
44.1.12.0/22
44.1.16.0/20
44.1.32.0/19
44.1.64.0/18
44.1.128.0/17
44.2.0.0/20
44.2.16.0/23
44.2.19.0/24
44.2.20.0/22
44.2.24.0/21
44.2.32.0/20
44.2.48.0/22
44.2.54.0/23
44.2.56.0/21
44.2.64.0/18
44.2.128.0/17
44.3.128.0/17
44.4.0.0/20
44.4.16.0/24
44.4.18.0/23
44.4.20.0/22
44.4.24.0/21
44.4.32.0/21
44.4.40.0/24
44.4.42.0/23
44.4.46.0/23
44.4.48.0/23
44.4.50.0/24
44.4.52.0/24
44.4.54.0/23
44.4.56.0/24
44.4.60.0/22
44.4.68.0/22
44.4.72.0/21
44.4.80.0/20
44.4.96.0/19
44.4.132.0/22
44.4.136.0/21
44.4.144.0/20
44.4.160.0/19
44.4.192.0/18
44.6.0.0/17
44.6.129.0/24
44.6.130.0/23
44.6.132.0/22
44.6.136.0/21
44.6.144.0/20
44.6.160.0/19
44.6.192.0/18
44.7.16.0/20
44.7.32.0/19
44.7.64.0/18
44.7.128.0/17
44.8.0.0/22
44.8.4.0/24
44.8.6.0/23
44.8.8.0/21
44.8.16.0/20
44.8.32.0/19
44.8.64.0/18
44.8.128.0/17
44.9.24.0/21
44.9.32.0/19
44.9.64.0/18
44.9.128.0/17
44.10.0.0/22
44.10.5.0/24
44.10.6.0/23
44.10.8.0/23
44.10.11.0/24
44.10.12.0/22
44.10.16.0/20
44.10.32.0/19
44.10.64.0/18
44.10.128.0/17
44.12.0.0/22
44.12.4.0/23
44.12.8.0/24
44.12.10.0/23
44.12.12.0/23
44.12.15.0/24
44.12.16.0/20
44.12.32.0/20
44.12.49.0/24
44.12.50.0/23
44.12.52.0/22
44.12.56.0/21
44.12.64.0/19
44.12.100.0/22
44.12.104.0/21
44.12.112.0/20
44.12.128.0/17
44.13.0.0/16
44.14.0.0/16
44.15.128.0/18
44.15.192.0/19
44.15.224.0/20
44.16.0.0/21
44.16.8.0/23
44.16.11.0/24
44.16.12.0/23
44.16.14.0/24
44.16.16.0/20
44.16.32.0/20
44.16.48.0/23
44.16.52.0/22
44.16.56.0/21
44.16.64.0/18
44.16.128.0/17
44.17.0.0/16
44.18.0.0/20
44.18.16.0/21
44.18.24.0/22
44.18.32.0/20
44.18.48.0/23
44.18.50.0/24
44.18.52.0/22
44.18.56.0/22
44.18.61.0/24
44.18.62.0/23
44.18.64.0/18
44.18.128.0/17
44.19.0.0/16
44.20.0.0/22
44.20.5.0/24
44.20.6.0/23
44.20.8.0/21
44.20.16.0/21
44.20.24.0/22
44.20.28.0/24
44.20.30.0/23
44.20.32.0/21
44.20.40.0/23
44.20.42.0/24
44.20.44.0/22
44.20.48.0/20
44.20.64.0/18
44.20.128.0/17
44.21.0.0/16
44.22.0.0/15
44.24.0.0/17
44.24.128.0/22
44.24.132.0/23
44.24.134.0/24
44.24.136.0/21
44.24.144.0/20
44.24.160.0/19
44.24.192.0/21
44.24.204.0/22
44.24.208.0/21
44.24.216.0/22
44.24.220.0/24
44.24.222.0/23
44.24.224.0/19
44.26.0.0/18
44.26.64.0/19
44.26.96.0/21
44.26.104.0/22
44.26.108.0/23
44.26.111.0/24
44.26.112.0/20
44.26.128.0/19
44.26.160.0/22
44.26.165.0/24
44.26.167.0/24
44.26.169.0/24
44.26.170.0/23
44.26.172.0/22
44.26.176.0/20
44.26.192.0/18
44.28.0.0/15
44.30.0.0/24
44.30.2.0/23
44.30.5.0/24
44.30.8.0/23
44.30.11.0/24
44.30.12.0/23
44.30.19.0/24
44.30.21.0/24
44.30.25.0/24
44.30.32.0/24
44.30.37.0/24
44.30.39.0/24
44.30.40.0/23
44.30.43.0/24
44.30.45.0/24
44.30.50.0/24
44.30.53.0/24
44.30.54.0/23
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44.30.67.0/24
44.30.77.0/24
44.30.80.0/24
44.30.86.0/24
44.30.91.0/24
44.30.93.0/24
44.30.100.0/24
44.30.102.0/24
44.30.105.0/24
44.30.108.0/24
44.30.112.0/24
44.30.123.0/24
44.30.124.0/24
44.30.129.0/24
44.30.144.0/23
44.30.147.0/24
44.30.148.0/24
44.30.154.0/23
44.30.156.0/24
44.30.159.0/24
44.30.161.0/24
44.30.166.0/23
44.30.176.0/24
44.30.178.0/23
44.30.198.0/23
44.30.204.0/24
44.30.207.0/24
44.30.208.0/24
44.30.214.0/24
44.30.217.0/24
44.30.220.0/23
44.30.225.0/24
44.30.227.0/24
44.30.228.0/24
44.30.233.0/24
44.30.234.0/23
44.30.236.0/22
44.30.240.0/20
44.31.5.0/24
44.31.9.0/24
44.31.10.0/24
44.31.19.0/24
44.31.20.0/23
44.31.33.0/24
44.31.34.0/23
44.31.45.0/24
44.31.51.0/24
44.31.54.0/23
44.31.58.0/23
44.31.73.0/24
44.31.74.0/23
44.31.77.0/24
44.31.79.0/24
44.31.85.0/24
44.31.87.0/24
44.31.97.0/24
44.31.98.0/24
44.31.104.0/24
44.31.108.0/24
44.31.110.0/24
44.31.112.0/24
44.31.114.0/24
44.31.119.0/24
44.31.134.0/24
44.31.137.0/24
44.31.143.0/24
44.31.152.0/21
44.31.163.0/24
44.31.165.0/24
44.31.171.0/24
44.31.175.0/24
44.31.180.0/24
44.31.182.0/24
44.31.184.0/24
44.31.193.0/24
44.31.198.0/23
44.31.208.0/23
44.31.210.0/24
44.31.224.0/24
44.31.230.0/24
44.31.232.0/23
44.31.243.0/24
44.31.249.0/24
44.32.0.0/21
44.32.12.0/22
44.32.54.0/24
44.32.59.0/24
44.32.60.0/24
44.32.77.0/24
44.32.79.0/24
44.32.88.0/23
44.32.93.0/24
44.32.101.0/24
44.32.109.0/24
44.32.110.0/24
44.32.132.0/23
44.32.136.0/23
44.32.149.0/24
44.32.150.0/24
44.32.152.0/23
44.32.159.0/24
44.32.160.0/24
44.32.164.0/24
44.32.166.0/24
44.32.168.0/22
44.32.172.0/23
44.32.174.0/24
44.32.188.0/23
44.32.196.0/24
44.32.198.0/24
44.32.201.0/24
44.32.203.0/24
44.32.208.0/20
44.32.226.0/23
44.32.228.0/22
44.32.233.0/24
44.32.234.0/24
44.32.236.0/22
44.32.240.0/20
44.34.0.0/18
44.34.64.0/19
44.34.96.0/22
44.34.100.0/23
44.34.104.0/24
44.34.106.0/23
44.34.108.0/22
44.34.112.0/20
44.34.136.0/21
44.34.144.0/20
44.34.160.0/19
44.34.192.0/18
44.35.0.0/16
44.36.0.0/21
44.36.8.0/22
44.36.12.0/23
44.36.15.0/24
44.36.16.0/24
44.36.18.0/23
44.36.20.0/22
44.36.24.0/21
44.36.32.0/19
44.36.64.0/18
44.36.128.0/18
44.36.192.0/19
44.36.224.0/20
44.36.248.0/21
44.37.0.0/16
44.38.0.0/15
44.40.0.0/19
44.40.32.0/21
44.40.40.0/22
44.40.49.0/24
44.40.50.0/23
44.40.52.0/22
44.40.56.0/21
44.40.64.0/18
44.40.128.0/19
44.40.162.0/23
44.40.164.0/22
44.40.168.0/21
44.40.176.0/20
44.40.192.0/18
44.41.0.0/16
44.42.0.0/21
44.42.8.0/24
44.42.10.0/23
44.42.12.0/22
44.42.16.0/20
44.42.32.0/19
44.42.64.0/18
44.42.128.0/17
44.43.0.0/16
44.44.0.0/18
44.44.64.0/19
44.44.96.0/20
44.44.112.0/22
44.44.116.0/24
44.44.118.0/23
44.44.120.0/22
44.44.124.0/23
44.44.128.0/17
44.45.0.0/16
44.46.0.0/20
44.46.16.0/23
44.46.21.0/24
44.46.22.0/23
44.46.25.0/24
44.46.26.0/23
44.46.28.0/22
44.46.32.0/19
44.46.64.0/18
44.46.128.0/17
44.47.0.0/16
44.48.0.0/20
44.48.17.0/24
44.48.18.0/23
44.48.20.0/22
44.48.24.0/21
44.48.32.0/21
44.48.40.0/24
44.48.42.0/23
44.48.44.0/22
44.48.48.0/20
44.48.64.0/18
44.48.128.0/17
44.49.0.0/16
44.50.0.0/24
44.50.2.0/23
44.50.4.0/22
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44.50.16.0/20
44.50.32.0/19
44.50.64.0/18
44.50.128.0/17
44.51.0.0/16
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44.52.64.0/19
44.52.96.0/20
44.52.112.0/21
44.52.121.0/24
44.52.122.0/23
44.52.124.0/22
44.52.128.0/17
44.53.0.0/16
44.54.0.0/15
44.56.0.0/17
44.56.129.0/24
44.56.130.0/23
44.56.132.0/22
44.56.136.0/21
44.56.144.0/20
44.56.161.0/24
44.56.162.0/23
44.56.164.0/22
44.56.168.0/21
44.56.176.0/20
44.56.192.0/21
44.56.200.0/22
44.56.204.0/23
44.56.208.0/20
44.56.224.0/19
44.57.0.0/16
44.58.0.0/15
44.60.0.0/18
44.60.64.0/19
44.60.96.0/21
44.60.104.0/22
44.60.108.0/24
44.60.110.0/23
44.60.112.0/20
44.60.128.0/17
44.61.0.0/16
44.62.0.0/23
44.62.2.0/24
44.62.4.0/22
44.62.8.0/23
44.62.12.0/24
44.62.16.0/20
44.62.32.0/19
44.62.64.0/18
44.62.128.0/17
44.63.0.0/16
44.64.0.0/18
44.64.64.0/19
44.64.96.0/20
44.64.112.0/22
44.64.116.0/23
44.64.119.0/24
44.64.120.0/21
44.64.128.0/17
44.65.0.0/16
44.66.0.0/15
44.68.0.0/17
44.68.128.0/18
44.68.192.0/21
44.68.200.0/22
44.68.204.0/24
44.68.206.0/23
44.68.208.0/20
44.68.224.0/19
44.69.0.0/16
44.70.0.0/20
44.70.16.0/21
44.70.25.0/24
44.70.26.0/23
44.70.28.0/22
44.70.32.0/20
44.70.48.0/22
44.70.52.0/24
44.70.54.0/23
44.70.56.0/21
44.70.64.0/18
44.70.128.0/17
44.71.0.0/16
44.72.0.0/20
44.72.17.0/24
44.72.18.0/23
44.72.20.0/22
44.72.24.0/21
44.72.32.0/19
44.72.64.0/18
44.72.128.0/17
44.73.0.0/16
44.74.0.0/15

IPv6 prefixes

All 34 prefixes.

2001:48d0:c000::/34
2607:f380:1::118:9a41:7380/122
2607:f720::/36
2607:f720:1000::/38
2607:f720:1400::/39
2607:f720:1600::/40
2607:f720:1700::/52
2607:f720:1700:1000::/53
2607:f720:1700:1800::/55
2607:f720:1700:1a00::/56
2607:f720:1700:1b00::/59
2607:f720:1700:1b20::/60
2607:f720:1700:1b31::/64
2607:f720:1700:1b32::/63
2607:f720:1700:1b34::/62
2607:f720:1700:1b38::/61
2607:f720:1700:1b40::/58
2607:f720:1700:1b80::/57
2607:f720:1700:1c00::/54
2607:f720:1700:2000::/51
2607:f720:1700:4000::/50
2607:f720:1700:8000::/49
2607:f720:1701::/48
2607:f720:1702::/47
2607:f720:1704::/46
2607:f720:1708::/45
2607:f720:1710::/44
2607:f720:1720::/43
2607:f720:1740::/42
2607:f720:1780::/41
2607:f720:1800::/37
2607:f720:2000::/35
2607:f720:4000::/34
2607:f720:8000::/33

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IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources