Autonomous system
AS15338 CEROBI - CEROBI LLC
Unclassified ARIN
Summary
CEROBI
business hosting enterprise
The block is registered to a carrier, under a netname describing a much larger parent range.
What it's used for
- A company's network. A single IPv4
/24announced from the United States, no IPv6, and one observed BGP neighbour.
Notable
- The block is registered not to the AS holder but to a communications carrier, whose corporate name carries a roman numeral marking a successor entity.
- Its netname is the registry's default form built from the parent allocation's address rather than from this block, so the label names a range far larger than the route.
- The holder's own name appears only in the AS handle and the holder record, never in the block's registration.
- Three addresses were queried for reverse DNS and none returned a name.
- Two hundred and fifty-six addresses behind one upstream.
Interesting
- A netname naming the parent is how carriers register a large block once and cut customer pieces from it without updating the label. It means a lookup on this address returns information about a range that mostly has nothing to do with it.
- A roman numeral in a company name records a restructuring, where the original entity was replaced by a second one holding the same assets. The registry keeps the numeral long after anyone remembers why.
- The AS handle is the only field naming the operator, which makes it the only useful identifier here.
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.
Transit providers
1 upstream, 0 downstream and 1 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS29838 | Atlantic Metro Communications II, Inc. | 58 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-06, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 1 prefixes · 256 addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 1 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS15338- Registry name
- CEROBI
- Registrant
- CEROBI LLC
- Abuse contact
- admin@cerobi.com
- Registered
- 2023-02-03
- Last changed
- 2023-02-03
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 1 with no ROA
- ROAs
- 0 authorising AS15338
- ASPA
- no ASPA record
- IRR
- 0% registered · 0 of 1 announcements
- Route objects
- 0 naming AS15338
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: 454 networks and 1,854 prefixes, as published 2026-11-06. 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