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

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

204.242.200.0

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

204.242.200.0/21

Prefix:

204.242.200.0/21 (2.048 IP's - view in CIDR to IP tool)

Description:

Deutsche Telekom AG

Country:

Britain (UK)

Announced by:

Deutsche Telekom AG
https://globalcarrier.telekom.com

AS3320, 695 peers, 589 announced prefixes

See all details on AS3320 - Deutsche Telekom AG »

Matching prefixes

Country

ASN

Announced prefix

Description

Size

United States

AS174

204.240.0.0/14

Cogent Communications

262.144

Britain (UK)

AS6079

204.242.192.0/20

RCN

4.096

Britain (UK)

AS3320

204.242.200.0/21

Deutsche Telekom AG

2.048

Log

000	+000	Parse input (Prefix)
000	+000	Search database for '204.242.200.0/21'
012	+012	3 prefixes found
012	+000	Done

ASN database

Related tools

Result

204.242.200.0/21

Matching prefixes

Log

The tools of iamroot.tech

Changelog

Newsletter