This AS is not currently used to announce prefixes in the global routing table, nor is it used as a visible transit AS.
whois: 402603
IANA has recorded AS51939 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS51939\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 'AS51857 - AS52209'
as-block: AS51857 - AS52209
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: 2024-12-12T14:34:06Z
last-modified: 2024-12-12T14:34:06Z
source: RIPE
% Information related to 'AS51939'
% Abuse contact for 'AS51939' is 'abuse@terra-net.uk'
aut-num: AS51939
as-name: TerraMC
org: ORG-TA1675-RIPE
sponsoring-org: ORG-SA4302-RIPE
import: from AS58057 accept ANY
export: to AS58057 announce AS51939
import: from AS61218 accept ANY
export: to AS61218 announce AS51939
import: from AS21700 accept ANY
export: to AS21700 announce AS51939
import: from AS35661 accept ANY
export: to AS35661 announce AS51939
import: from AS20473 accept ANY
export: to AS20473 announce AS51939
import: from AS38008 accept ANY
export: to AS38008 announce AS51939
import: from AS47272 accept ANY
export: to AS47272 announce AS51939
import: from AS209735 accept ANY
export: to AS209735 announce AS51939
import: from AS65473 accept ANY
export: to AS65473 announce AS51939
admin-c: TUC3-RIPE
admin-c: SBAC-RIPE
tech-c: SBAC-RIPE
tech-c: TUC2-RIPE
status: ASSIGNED
mnt-by: RIPE-NCC-END-MNT
mnt-by: SBMT
mnt-by: TMC-MNT
created: 2022-12-22T09:56:24Z
last-modified: 2025-12-31T17:50:19Z
source: RIPE
remarks: LAGRANGE.CLOUD-7397042954f19bdd3a31dae15d1b721c
organisation: ORG-TA1675-RIPE
org-name: Terra Management Consulting Ltd
country: GB
reg-nr: 09172244
org-type: OTHER
address: 85 Great Portland Street
address: London
address: W1W 7LT
address: UNITED KINGDOM
phone: +44 20 3835 2410
fax-no: +44 20 3835 2411
abuse-c: TUM1-RIPE
tech-c: TUC3-RIPE
admin-c: TUC2-RIPE
mnt-ref: TMC-MNT
mnt-ref: SBMT
mnt-by: TMC-MNT
created: 2022-11-26T03:28:50Z
last-modified: 2026-05-13T06:03:46Z
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)