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.
AS204727 1 More Specifics 1 Total Advertisements SIS-NETWORKS, NL
151.248.18.0/24 151.248.16.0/22
Prefixes added and withdrawn by this origin AS in the past 7 days.
+ 151.248.18.0/24 Announced
whois: 402590
IANA has recorded AS204727 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS204727\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 'AS204727'
% Abuse contact for 'AS204727' is 'abuse@nextpertise.nl'
aut-num: AS204727
as-name: SIS-Networks
org: ORG-IA661-RIPE
import: from AS202120 accept ANY
export: to AS202120 announce AS204727
import: from AS209288 accept ANY
export: to AS209288 announce AS204727
admin-c: Ara36-RIPE
tech-c: Tra30-RIPE
status: ASSIGNED
mnt-by: RIPE-NCC-END-MNT
mnt-by: NEXTPERTISE-MNT
created: 2022-06-10T11:08:31Z
last-modified: 2025-12-23T09:58:53Z
source: RIPE
organisation: ORG-IA661-RIPE
org-name: Nextpertise B.V.
country: NL
reg-nr: 27282719
org-type: LIR
address: Postbus 533
address: 2700 AM
address: ZOETERMEER
address: NETHERLANDS
phone: +31887775200
admin-c: Ara36-RIPE
tech-c: Tra30-RIPE
abuse-c: Tra30-RIPE
mnt-ref: RIPE-NCC-HM-MNT
mnt-ref: NEXTPERTISE-MNT
mnt-by: RIPE-NCC-HM-MNT
mnt-by: NEXTPERTISE-MNT
created: 2006-11-21T10:04:10Z
last-modified: 2026-05-13T07:30:56Z
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)