AS63331 Lawrence Berkeley National Laboratory

LBL-2 - Lawrence Berkeley National Laboratory · registered in the United States

IPv4 addresses7725 prefixes · <0.001% of announced IPv4

Rank in United States#9,064largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#42,455of 79,396 networks with IPv4

IPv62 x /483 prefixes

CountryUnited States18,679 ASNs registered there

Open AS63331 in ASN lookup Look up an IP in this network (137.164.23.39) All networks in United States

IPv4 prefixes

All 5 prefixes, in address order.

137.164.23.38/31
137.164.50.250/31
192.12.173.0/24
192.58.231.0/24
204.62.155.0/24

IPv6 prefixes

All 3 prefixes.

2607:f380:1::118:9a41:7260/123
2607:f380:1::118:9a43:2fa0/123
2620:83:8004::/47

Other ASNs named Lawrence Berkeley National Laboratory

1 other network uses the same organisation name; together with AS63331 they announce 131,848 IPv4 addresses.

ASNNameIPv4 addresses

AS16LBL - Lawrence Berkeley National Laboratory US131,076

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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