ASN database

You may find these sub-pages interesting as well:

Related tools

DNS lookup / nslookup / DIG of DNS records. An online tool for DNS lookups. By default recursive lookups querying the authoritative name servers. Lookups on specific DNS resolvers are also possible. Additionally, it will look up secondary records and output a full log of what was done on a technical level.

WHOIS / RDAP lookup

Perform WHOIS and/or RDAP lookups on domains, IP addresses, and ASNs. Will output all available technical info, contact info, etc.

Reverse DNS

Perform reverse DNS (rDNS/PTR) lookups of any IP.

CIDR calculator

beta

IP to CIDR calculation tool with subnet info. The reverse, CIDR ranges to IP addresses, is also possible. Last but not least, it includes a tool for refactoring groups of IPs, domain names, and/or other CIDR ranges.

What is my IPv4 and IPv6?

Check your own IP - both IPv4 and IPv6. Works as a connectivity test as well.

GeoIP location

Online tool GeoIP location of any IP and/or domain.

World map, day/night + local time

beta

Beautiful day/night map of the world, with markup of all major cities including local date and time.

Result

AS131932, JR East Information Systems Company

Last update of data:
05-05-2024 18:37 UTC

ASN:

AS131932 (JEIS-NET)

Country:

JP - Japan (Asia)

Org.:

JR East Information Systems Company

Stats:

Peers

IX'es

Prefixes

IPv4

+327K

IPv6

Contact:

JR East Information Systems Company
JP

Peers

Country

Relationship

ASN

Organization

Peers

Prefix'es

Japan

Upstream

AS2516

KDDI

302

400

Japan

Upstream

AS17676

SoftBank Corp.

303

346

Announced (uniq) prefixes

Country

ASN

Announced prefix

Description

Size

Japan

AS131932

157.71.0.0/17