Autonomous System

AS3640 C I C E S E

EducationActiveMexicoLACNIC

AS3640 (AS3640) is an education network operated by C I C E S E in Mexico, registered with LACNIC. It has 6 IPv4 prefixes with 63,744 addresses and 2 IPv6 prefixes, which makes it the 3,924th largest of 82,283 active autonomous systems by IPv4 space.

IPv4 addresses63,744in 6 prefixes
IPv6 prefixes2≈ 1.9 × 10²⁵ addresses
Size rank#3,924of 82,283 active ASNs
Abuser scoreVery Lowunder 0.01% of its addresses flagged · method

Details

OrganizationC I C E S E
AS nameAS3640
Websitecicese.edu.mx
Country Mexico (MX)
Network typeEducation
RegistryLACNIC
Abuse contactjefred@cicese.edu.mx
Registered19940601
Last updated20250620

IPv4 prefixes

6 prefixes · 63,744 addresses
NetworkAddressesFirst – last address
158.97.128.0/1732,768158.97.128.0 – 158.97.255.255
158.97.0.0/1816,384158.97.0.0 – 158.97.63.255
158.97.64.0/198,192158.97.64.0 – 158.97.95.255
158.97.96.0/204,096158.97.96.0 – 158.97.111.255
158.97.120.0/212,048158.97.120.0 – 158.97.127.255
192.84.12.0/24256192.84.12.0 – 192.84.12.255

IPv6 prefixes

2 prefixes
  • 2801:c4:f0::/45
  • 2801:c4:f8::/45

Query AS3640 with the API

The ASN lookup returns everything on this page as JSON, including every prefix. ASN lookups need an API key: a free account comes with 1,000 requests a day. 

curl "https://api.ipapi.is/?q=AS3640&key=YOUR_API_KEY"

Any address in its prefixes resolves to AS3640, with or without a key:

curl "https://api.ipapi.is/?q=158.97.128.1"

Largest networks in Mexico

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