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ASN Lookup Tool
AS3640 Private Use AS

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ASN Extended Info API & BGP Active Prefixes API
ASN Details
ASN
AS3640
Organisation
C I C E S E
Name
Private Use AS
Total IPv4 Addresses
65,792
Total IPv4 Prefixes
7
Total IPv6 Prefixes
2
Total IPv4 Bogon Prefixes
0
Total IPv6 Bogon Prefixes
0
IPv4 Space Rank
#2,978 out of 79,013
Registry
Lacnic
Registered Country
MX flagMX
Registered Country Name
Mexico
Registered Date
1994-06-01
Registration Last Change
2025-06-20
Receiving From
ASN
Organisation
AS28569
MX flagCorporacion Universitaria para el Desarrollo de ..
AS8151
MX flagUNINET
Transit To
ASN
Organisation
AS278
MX flagUniversidad Nacional Autonoma de Mexico
AS16596
MX flagUniversidad Autonoma del Estado de Baja Californ..
IPv4 Active Prefixes
PrefixRange FromRange To
158.97.0.0/18158.97.0.0158.97.63.255
158.97.64.0/19158.97.64.0158.97.95.255
158.97.96.0/20158.97.96.0158.97.111.255
158.97.112.0/21158.97.112.0158.97.119.255
158.97.120.0/21158.97.120.0158.97.127.255
Showing 5 of 7
IPv6 Active Prefixes
PrefixRange FromRange To
2801:c4:f0::/452801:c4:f0::2801:c4:f7:ffff:ffff:ffff:ffff:ffff
2801:c4:f8::/452801:c4:f8::2801:c4:ff:ffff:ffff:ffff:ffff:ffff