This AS is not currently used to announce prefixes in the global routing table, nor is it used as a visible transit AS.
Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.
AS204437 1 More Specifics 1 Total Advertisements ETHZ-NSG, CH
192.33.88.0/24 192.33.88.0/21
Prefixes added and withdrawn by this origin AS in the past 7 days.
+ 192.33.88.0/24 Announced
whois: 402609
IANA has recorded AS204437 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS204437\n % This is the RIPE Database query service.
% The objects are in RPSL format.
%
% The RIPE Database is subject to Terms and Conditions.
% See https://docs.db.ripe.net/terms-conditions.html
% Note: this output has been filtered.
% Information related to 'AS203940 - AS205662'
as-block: AS203940 - AS205662
descr: RIPE NCC ASN block
remarks: These AS Numbers are assigned to network operators in the RIPE NCC service region.
mnt-by: RIPE-NCC-HM-MNT
created: 2026-03-05T15:29:31Z
last-modified: 2026-03-05T15:29:31Z
source: RIPE
% Information related to 'AS204437'
% Abuse contact for 'AS204437' is 'abuse@ethz.ch'
aut-num: AS204437
as-name: ETHZ-NSG
org: ORG-ETHZ1-RIPE
sponsoring-org: ORG-SG2-RIPE
import: from AS559 accept ANY
export: to AS559 announce AS204437
import: from AS696 accept ANY
export: to AS696 announce AS204437
admin-c: AW1297-RIPE
tech-c: HE688-RIPE
status: ASSIGNED
mnt-by: RIPE-NCC-END-MNT
mnt-by: SWITCH-MNT
created: 2022-06-23T13:19:55Z
last-modified: 2022-06-23T13:19:55Z
source: RIPE
organisation: ORG-ETHZ1-RIPE
org-name: Federal Institute of Technology Zurich (ETHZ)
country: CH
reg-nr: Not Applicable
org-type: OTHER
address: Raemistrasse 101
address: 8092 Zurich
address: Switzerland
admin-c: AW1297-RIPE
tech-c: HE688-RIPE
abuse-c: HE688-RIPE
mnt-ref: SWITCH-MNT
mnt-by: SWITCH-MNT
created: 2009-11-09T12:44:22Z
last-modified: 2026-05-13T05:29:29Z
source: RIPE # Filtered
role: Hostmaster ETHZ
address: ETH Zurich
address: ID ICT-Networks
address: CH-8092 Zurich
address: SWITZERLAND
phone: +41 44 6323555
admin-c: AW1297-RIPE
tech-c: AW1297-RIPE
nic-hdl: HE688-RIPE
abuse-mailbox: abuse@ethz.ch
mnt-by: SWITCH-MNT
created: 2005-06-22T08:30:06Z
last-modified: 2017-11-30T09:36:41Z
source: RIPE # Filtered
%ERROR:201: access denied for 2401:2000:6660:0:0:0:0:13
%
% Queries from your IP address have passed the daily limit of controlled objects.
% Access from your host has been temporarily denied.
% For more information, see
% https://docs.db.ripe.net/FAQ#why-did-i-receive-an-error-201-access-denied
% This query was served by the RIPE Database Query Service version 1.122.1 (BUSA)