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.
AS203727 2 More Specifics 2 Total Advertisements ALTAWK, UA
77.91.68.0/24 77.91.64.0/20
77.91.124.0/24 77.91.112.0/20
5.42.92.0/24 5.42.0.0/17
77.91.97.0/24 77.91.96.0/20
109.107.182.0/24 109.107.180.0/22
185.46.46.0/24 185.46.44.0/22
193.233.255.0/24 193.233.128.0/17
Prefixes added and withdrawn by this origin AS in the past 7 days.
- 5.42.92.0/24 Withdrawn
- 77.91.97.0/24 Withdrawn
- 109.107.182.0/24 Withdrawn
- 185.46.46.0/24 Withdrawn
- 193.233.255.0/24 Withdrawn
whois: 402590
IANA has recorded AS203727 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS203727\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 'AS203113 - AS203887'
as-block: AS203113 - AS203887
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: 2024-11-12T15:22:00Z
last-modified: 2024-11-12T15:22:00Z
source: RIPE
% Information related to 'AS203727'
% Abuse contact for 'AS203727' is 'abuse@byon.de'
aut-num: AS203727
as-name: byon
org: ORG-BG304-RIPE
import: from AS8220 accept ANY
export: to AS8220 announce AS203727
import: from AS215197 accept ANY
export: to AS215197 announce AS203727
admin-c: RB48079-RIPE
tech-c: CF9572-RIPE
status: ASSIGNED
mnt-by: RIPE-NCC-END-MNT
mnt-by: lir-de-byongmbh-1-MNT
created: 2025-11-17T11:39:24Z
last-modified: 2025-11-17T11:39:24Z
source: RIPE
organisation: ORG-BG304-RIPE
org-name: byon GmbH
country: DE
reg-nr: District court Frankfurt am Main HRB 131855
org-type: LIR
address: Solmsstrasse 71
address: 60486
address: Frankfurt am Main
address: GERMANY
phone: +4969710486700
admin-c: RB48079-RIPE
tech-c: CF9572-RIPE
abuse-c: AR72962-RIPE
mnt-ref: lir-de-byongmbh-1-MNT
mnt-by: RIPE-NCC-HM-MNT
mnt-by: lir-de-byongmbh-1-MNT
created: 2023-10-23T07:01:43Z
last-modified: 2026-05-13T07:08:59Z
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.
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% 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 (DEXTER)