ASN AS43861 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS43861?

AS43861 is listed under Circle B B.V..

What do peers, upstreams, and downstreams mean in ASN data?

Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.

What are routes and IP ranges for an ASN?

Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.

Why is WHOIS data shown for an ASN?

WHOIS data provides registration and contact context for ASN ownership, administration, and operational reference.

How can I access the full ASN tables?

The page shows a preview of large ASN datasets. Use the page controls to load more rows, and upgrade to a paid plan for complete access.

AS43861 Circle B B.V. | IPGeolocation.io

ASN Lookup Tool

Circle B B.V. circleb.eu

NL 6 Routes

AS Data

AS43861

AS43861 – Circle B B.V.

AS Number	43861
AS Name	CIRCLEB-ASN
Organization	Circle B B.V.(org-cbb4-ripe)
Country	NL
Website	circleb.eu
Number of IPv4 Routes	4
Number of IPv6 Routes	2
ASN type	ISP
Allocation Status	ASSIGNED
Registry	RIPE
Date Allocated	2016-12-20

ASN Intelligence API for production workflows

Use ASN data for AS43861 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

Access complete peers, upstreams, downstreams, routes, WHOIS, and contact intelligence via our API. Learn more

Get ASN API Key ASN API Docs

IP Ranges

Route	Origin	Origin Name	ISP	# IPs
2a13:acc0::/32	AS43861	Circle B B.V.	Circle B B.V.	~79×10²⁷
45.134.176.0/23	AS43861	Circle B B.V.	Circle B B.V.	512
45.134.178.0/23	AS43861	Circle B B.V.	Circle B B.V.	512
91.199.227.0/24	AS43861	Circle B B.V.	Circle B B.V.	256
185.125.242.0/24	AS43861	Circle B B.V.	Circle B B.V.	256
2001:678:348::/48	AS43861	Circle B B.V.	Circle B B.V.	~1×10²⁴

Raw Whois Response

% 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.
%       To receive output for a database update, use the "-B" flag.

% Information related to 'AS43075 - AS44168'

as-block:       AS43075 - AS44168
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:        2023-12-11T15:09:58Z
last-modified:  2023-12-11T15:09:58Z
source:         RIPE

% Information related to 'AS43861'

% Abuse contact for 'AS43861' is 'abuse@circleb.eu'

aut-num:        AS43861
as-name:        CIRCLEB-ASN
org:            ORG-CBB4-RIPE
import:         from AS174 accept ANY
export:         to AS174 announce AS43861
import:         from AS38930 accept ANY
export:         to AS38930 announce AS43861
admin-c:        CA11153-RIPE
tech-c:         CA11153-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         lir-nl-circleb-1-MNT
mnt-by:         nl-circleb-mnt
created:        2016-12-20T14:43:21Z
last-modified:  2023-09-06T09:44:08Z
source:         RIPE

organisation:   ORG-CBB4-RIPE
org-name:       Circle B B.V.
country:        NL
org-type:       LIR
address:        Beechavenue 113
address:        1119 RB
address:        Schiphol-Rijk
address:        NETHERLANDS
phone:          +31858000430
admin-c:        CA11153-RIPE
tech-c:         CA11153-RIPE
abuse-c:        AR70724-RIPE
mnt-ref:        lir-nl-circleb-1-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         lir-nl-circleb-1-MNT
created:        2023-08-08T07:31:52Z
last-modified:  2023-08-08T07:31:52Z
source:         RIPE # Filtered

role:           CIRCLEB
address:        NETHERLANDS
address:        Schiphol-Rijk
address:        1119 RB
address:        Beechavenue 113
phone:          +31858000430
nic-hdl:        CA11153-RIPE
mnt-by:         lir-nl-circleb-1-MNT
created:        2023-08-08T07:31:50Z
last-modified:  2023-08-08T07:31:51Z
source:         RIPE # Filtered

% This query was served by the RIPE Database Query Service version 1.121 (BUSA)

Parsed Whois Response

Peers

AS Number	Description	Country
AS8220	COLT Technology Services Group Limited	GB
AS38930	LeaseWeb Network B.V.	NL
AS209870	Cylo Ltd	GB
AS174	Cogent Communications, LLC	US

Upstreams

AS Number	Description	Country
AS8220	COLT Technology Services Group Limited	GB
AS38930	LeaseWeb Network B.V.	NL

Downstreams

AS Number	Description	Country
AS209870	Cylo Ltd	GB