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AS257 Navy Network Information Center (NNIC)

DNIC-AS-00257 - Navy Network Information Center (NNIC) · registered in the United States

IPv4 addresses7168 prefixes · <0.001% of announced IPv4
Rank in United States#10,048largest network in US by IPv4 space, of 18,338 · <0.01% of US
Rank worldwide#46,207of 79,396 networks with IPv4
IPv61 x /485 prefixes
CountryUnited States18,679 ASNs registered there
Open AS257 in ASN lookup Look up an IP in this network (137.164.24.189) All networks in United States

IPv4 prefixes

All 8 prefixes, in address order.

  • 137.164.24.188/31
  • 137.164.50.148/30
  • 137.164.50.252/30
  • 204.102.228.128/25
  • 204.102.229.0/24
  • 204.102.230.112/31
  • 205.155.65.0/24
  • 209.129.248.192/26

IPv6 prefixes

All 5 prefixes.

  • 2607:f380:1::108:9a41:8bc0/123
  • 2607:f380:1::118:9a43:2940/122
  • 2607:f380:1::118:9a43:2fc0/122
  • 2607:f380:1::11c:c66e:6700/123
  • 2607:f380:804::/48

Other ASNs named Navy Network Information Center (NNIC)

9 other networks use the same organisation name; together with AS257 they announce 809,420 IPv4 addresses.

ASNNameIPv4 addresses
AS2749DNIC-AS-02749 - Navy Network Information Center (NNIC) US169,984
AS22DNIC-AS-00022 - Navy Network Information Center (NNIC) US139,264
AS89DNIC-AS-00089 - Navy Network Information Center (NNIC) US133,120
AS48DNIC-AS-00048 - Navy Network Information Center (NNIC) US131,072
AS37DNIC-AS-00037 - Navy Network Information Center (NNIC) US69,120
AS84DNIC-AS-00084 - Navy Network Information Center (NNIC) US66,560
AS5058NRL-EXP - Navy Network Information Center (NNIC) US65,536
AS1772DNIC-AS-01772 - Navy Network Information Center (NNIC) US32,768
AS190DNIC-AS-00190 - Navy Network Information Center (NNIC) US1,280

Similar-sized networks in United States

ASNNameIPv4 addresses
AS402472#10045 POPCORN - Popcorn768
AS402722#10046 ARCTCLOUD - Arct768
AS402810#10047 TDDT-NET - TDDT,768
AS26812#10049 ROTARY-INTERNATIONAL - Rotary International528
AS16573#10050 SMCC - Santa Monica Community College District524
AS399574#10051 RCCD-ASN - Riverside Community College District516

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