AS1637 is the autonomous system of Headquarters, USAISC. It holds 172,800 IPv4 addresses in 11 prefixes, mainly in 
Japan.
By IPv4 addresses the network ranks #1,185 worldwide and #54 of 848 networks in Japan. That is 0.08% of the country’s IPv4 space.
The network spreads across 2 countries: Japan 94%, United States 5.6%.
The largest block is 155.6.0.0 to 155.6.255.255 with 65,536 addresses, geolocated to Chiyoda City.
- IPv4 addresses
- 172,800
- IPv4 prefixes
- 11
- World rank
- #1,185
- Country share
- 0.08%
Addresses by country
- Japan 94%
United States 5.6%
Largest blocks
- 155.6.0.0 Chiyoda City65,536
- 143.46.0.0 Chiyoda City65,536
- 155.5.0.0 Chiyoda City36,864
- 143.68.152.0 Sierra Vista (Fort Huachuca)2,048
- 6.134.24.0 Columbus1,024
- 155.20.102.0 Chiyoda City512
- 6.16.88.0 Columbus512
- 192.172.29.0 Chiyoda City256
Networks of similar size
- AS17698 COMMUNITY NETWORK CENTER INCORPORATED.174,080
- AS7629 VITRO Inc.
173,568 - AS17917 Quadrant Televentures Limited
173,056 - AS36647 Oath Holdings Inc.173,056
- AS45062 NetEase Building No.16 Ke Yun Road,
172,800 - AS6300 Consolidated Communications, Inc.172,800
- AS2900 Arizona Tri University Network172,800
- AS9146 BH Telecom d.d. Sarajevo
172,288
IPv4 prefixes
Questions and answers
Who owns AS1637?
Autonomous system AS1637 is operated by Headquarters, USAISC.
How many IP addresses does AS1637 have?
The network holds 172,800 IPv4 addresses in 11 prefixes.
Which country is AS1637 in?
The main country is Japan, with addresses in 1 more countries.
How big is AS1637?
By IPv4 addresses it ranks #1,185 worldwide.
What is the largest address block of AS1637?
155.6.0.0 to 155.6.255.255, 65,536 addresses.