AS21700 Neptune Networks, LLC

NEPTUNE-NETWORKS - Neptune Networks, LLC · registered in the United States

IPv4 addresses2,8167 prefixes · <0.001% of announced IPv4

Rank in United States#5,420largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#19,159of 79,396 networks with IPv4

IPv61 x /32 (67,584 x /48)2 prefixes

CountryUnited States18,679 ASNs registered there

Open AS21700 in ASN lookup Look up an IP in this network (23.157.160.1) All networks in United States

IPv4 prefixes

All 7 prefixes, in address order.

23.157.160.0/24
157.254.142.0/24
172.82.22.0/23
192.109.165.0/24
209.151.100.0/22
216.74.121.0/24
216.126.57.0/24

IPv6 prefixes

All 2 prefixes.

2602:fe2e::/37
2606:f1c0::/32

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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