Autonomous system
AS13631 CIG-AS
Unclassified ARIN
Summary
Citadel Enterprise Americas
finance business enterprise
Fifty-six BGP neighbours for 3,328 addresses, and not one of them answers a reverse lookup.
What it's used for
- A trading firm's network. 3,328 addresses across ten IPv4 prefixes, the IPv6 block
2a13:bb87::/48, and fifty-six observed BGP neighbours.
Notable
- Blocks are registered to three separate regional entities, with netnames
CIG,CEAL-HKandUK-CITADEL. 46.255.29.0/24is netnameUK-CITADEL-20240708, carrying the date it was created.64.212.61.0/24is netnameLPL-141--CIGL-4-64-212-61, with a doubled hyphen in the middle.38.57.54.0/24is netnameCOGENT-A, registered to a transit provider.- Eighteen addresses were queried for reverse DNS and none returned a name.
- One prefix's registry lookup failed, so nothing is known about its registration here.
Interesting
- Fifty-six neighbours against a few thousand addresses is one of the most extreme ratios a network can have. This is a firm that peers directly with exchanges, venues and data providers in three regions, because the value is in the shortness of each path rather than in capacity.
- A completely silent reverse zone across every block, in every region, is consistent enough to be policy. Nothing volunteers a role, a venue or a location.
- The date stamped into one netname records when that registration was made, which is the only timestamp any of these objects offers.
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
Recorded at 6 exchanges in 3 countries, largest first.
| Exchange | Location | Their address |
|---|---|---|
| LINX LON1 | London, United Kingdom | 195.66.231.251 |
| Equinix Internet Exchange Singapore | Singapore, Singapore | 27.111.229.141 |
| London Network Access Point | London, United Kingdom | 5.57.80.235 |
| DE-CIX New York | New York, United States | 206.82.104.40 |
| Equinix Internet Exchange Chicago | Chicago, United States | 208.115.137.125 |
| FL-IX - The Florida Internet Exchange / Community IX - Florida | Miami, United States | 206.41.108.224 |
Transit providers
27 upstream, 0 downstream and 28 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-10, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 11 prefixes · 3.58K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 12 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS13631- Registry name
- CIG-AS
- Registrant
- CITADEL ENTERPRISE AMERICAS LLC
- Abuse contact
- opcenter@citadel.com
- Registered
- 2005-12-06
- Last changed
- 2021-10-19
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 87% valid · 13 valid, 2 with no ROA
- ROAs
- 12 authorising AS13631
- ASPA
- no ASPA record
- IRR
- 80% registered · 12 of 15 announcements
- Route objects
- 21 naming AS13631
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: 431 networks and 1,775 prefixes, as published 2026-10-11. 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