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.

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

CIDR calculator

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.

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

World map, day/night + local time

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

Result

AS1133, SURF B.V.

Last update of data:
04-05-2024 12:23 UTC

ASN:

AS1133 (UTWENTE-AS)

Country:

NL - Netherlands (Europe)

Org.:

SURF B.V.
https://www.surf.nl
Social media: @twitter/X

Stats:

Peers

1

IX'es

1

Prefixes

2

IPv4

+65K

IPv6

1,2E+24

Contact:

SURF B.V.
P.O. Box 19035
3501 DA
Utrecht
NETHERLANDS

voice +31887873000

SURF Network Maintainer
Kantoren Hoog Overborch (Hoog Catharijne)
Moreelsepark 48, 3511 EP Utrecht
Postbus 19035, 3501 DA Utrecht
voice +31 88 7873000
cert@surfcert.nl

Peers

Country

Relationship

ASN

Organization

Peers

Prefix'es

Netherlands

Upstream

1.087

95

Internet eXchange (IX) connections

Country

City

IX name

Port speed

Members

Netherlands

Enschede

-

23

Announced (uniq) prefixes

Country

ASN

Announced prefix

Description

Size

Netherlands

SURF B.V.

65.536

Country

ASN

Announced prefix

Description

Size

Netherlands

2001:67c:2564::/48

SURF B.V.

1,2E+24

Log

000	+000	Parse input (ASN)
000	+000	Search database for 'AS1133'
005	+005	1 ASN's found
005	+000	Done
005	+000	Load details of AS1133
014	+009	2 prefixes found
017	+003	1 peers found
020	+003	1 IX members found (1 connections)
022	+002	3 links loaded, 2 verified
023	+001	1 historical items loaded
023	+000	Done

Changelog

Newsletter

Bi-weekly (at most) with updates, changelog and info from the website. Just straight to the point info - no BS! Sign up right here, or read more about the iamroot.tech newsletter.

Signup using Google

Signup using Github

Other options: Signup using Microsoft or Signup using Facebook.

OR

No personal information gathered anywhere. E-mail may be used for login and/or newsletter - will not be sold or used by anyone else but iamroot.tech. Cookies are in use for statistical and useability purposes. Trademarks property of their respective owners. A privacy policy and terms and conditions is availible if you like.

iamrootdottech@gmail.com
Bundgaard - Løvenørnsgade 56, 2tv - DK-8700 Horsens - Denmark

Shoutouts and credits to: Bootstrap, jQuery, Bootstrap live customizer by Virtuosoft, DnsClient.NET by MichaCo, LazyLoad by Mika Tuupola, the Olson tz database by IANA, Visible earth by NASA, GeoLite2 by MaxMind, Barcoder by Wouter Huysentruit, ICONS8.
json-viewer by alenaksu.

iamrootdottech@gmail.com
Bundgaard - Løvenørnsgade 56, 2tv - DK-8700 Horsens - Denmark

No personal information gathered anywhere. E-mail may be used for login and/or newsletter - will not be sold or used by anyone else but iamroot.tech. Cookies are in use for statistical and useability purposes. Trademarks property of their respective owners. A privacy policy and terms and conditions is availible if you like.