Autonomous system
AS43861 CIRCLEB-ASN
Unclassified RIPE NSP
Summary
Circle B
business netherlands ipv6
The AS handle is CIRCLEB-ASN, held by Circle B B.V.
What it's used for
- The address space carries corporate infrastructure, with netnames
NL-CIRCLEB-20190729,NL-CIRCLEB-20080304, andNL-CIRCLEB-20250115all registered to Circle B B.V. - The network announces 1536 IPv4 addresses across 3 prefixes and 2 IPv6 prefixes, with only 3 observed neighbours, indicating a small-scale business or internal corporate estate rather than a transit or access provider.
- Traffic from this AS consists of web/API endpoints and internal services for Circle B B.V., a company based in Schiphol-Rijk, Noord-Holland.
Notable
- All registrants for the announced prefixes agree with the announcer, consistently listing Circle B B.V.
- The address inventory is compact, consisting of one /22 and two /24 blocks in IPv4, alongside a /48 and a /32 in IPv6.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-13, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 3 prefixes · 1.54K addresses IPv6 2 prefixes
| Country | Name | Prefixes |
|---|---|---|
| NL | Netherlands | 5 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS43861- Registry name
- CIRCLEB-ASN
- Registrant
- lir-nl-circleb-1-MNT
- Abuse contact
- abuse@circleb.eu
- Registered
- 2016-12-20
- Last changed
- 2023-09-06
- Allocation
- allocated
Declared
PeeringDB profile
- Name
- Circle B
- Network type
- NSP
- Scope
- Not Disclosed
- Traffic ratio
- Not Disclosed
- Peering policy
- Open
- IRR as-set
RIPE::AS-CIRCLEB- Facilities
- 3 facilities
- Website
- https://circleb.eu
PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.
Routing security
RPKI and IRR
- RPKI
- 100% valid · 6 valid, 0 with no ROA
- ROAs
- 6 authorising AS43861
- ASPA
- no ASPA record
- IRR
- 100% registered · 6 of 6 announcements
- Route objects
- 6 naming AS43861
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 442 networks and 1,773 prefixes, as published 2026-10-13. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere