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AS10343 National Aeronautics and Space Administration

AS10343 - National Aeronautics and Space Administration · registered in the United States

IPv4 addresses123,90413 prefixes · 0.004% of announced IPv4
Rank in United States#570largest network in US by IPv4 space, of 18,338 · <0.01% of US
Rank worldwide#1,674of 79,396 networks with IPv4
IPv61 x /4821 prefixes
CountryUnited States18,679 ASNs registered there
Open AS10343 in ASN lookup Look up an IP in this network (129.99.0.1) All networks in United States

IPv4 prefixes

All 13 prefixes, in address order.

  • 129.99.0.0/17
  • 129.99.128.0/18
  • 129.99.192.0/19
  • 129.99.224.0/20
  • 129.99.240.0/21
  • 129.99.248.0/22
  • 129.99.252.0/24
  • 129.99.253.0/24
  • 129.99.254.0/23
  • 192.92.164.0/22
  • 198.9.0.0/17
  • 198.9.128.0/18
  • 198.9.192.0/19

IPv6 prefixes

All 21 prefixes.

  • 2001:4d0:6118::/51
  • 2001:4d0:6118:2000::/55
  • 2001:4d0:6118:2200::/58
  • 2001:4d0:6118:2240::/60
  • 2001:4d0:6118:2250::/63
  • 2001:4d0:6118:2252::/64
  • 2001:4d0:6118:2253::/64
  • 2001:4d0:6118:2254::/62
  • 2001:4d0:6118:2258::/61
  • 2001:4d0:6118:2260::/59
  • 2001:4d0:6118:2280::/57
  • 2001:4d0:6118:2300::/56
  • 2001:4d0:6118:2400::/54
  • 2001:4d0:6118:2800::/53
  • 2001:4d0:6118:3000::/52
  • 2001:4d0:6118:4000::/50
  • 2001:4d0:6118:8000::/49
  • 2001:4d0:6318::/49
  • 2001:4d0:6318:8000::/50
  • 2001:4d0:6318:c000::/51
  • 2001:4d0:6318:e000::/52

Other ASNs named National Aeronautics and Space Administration

8 other networks use the same organisation name; together with AS10343 they announce 2,839,554 IPv4 addresses.

ASNNameIPv4 addresses
AS270AS270 - National Aeronautics and Space Administration US1,859,328
AS297AS297 - National Aeronautics and Space Administration US649,472
AS1701AS1701 - National Aeronautics and Space Administration US131,072
AS24AS24 - National Aeronautics and Space Administration US65,538
AS1848AS1848 - National Aeronautics and Space Administration US6,144
AS372AS372 - National Aeronautics and Space Administration US1,792
AS2143AS2143 - National Aeronautics and Space Administration US1,792
AS21556NARC-EROOT - National Aeronautics and Space Administration US512

Similar-sized networks in United States

ASNNameIPv4 addresses
AS46844#567 SHARKTECH - Sharktech124,416
AS19416#568 RBC-NY - RBC CAPITAL MARKETS CORPORATION124,416
AS6#569 BULL-HN - ATOS IT Solutions and Services, Inc.124,160
AS53755#571 IOFLOOD - Input Output Flood LLC123,392
AS16904#572 ARVIG-16904 - Arvig Enterprises Inc.123,136
AS2495#573 KANREN - Kansas Research and Education Network123,136

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