asn.dev

Autonomous system

AS25811 DODI-01 - Diamond Offshore, LLC

Unclassified ARIN

IPv4 addresses 256 1 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

Diamond Offshore

United States of America · AI-generated

offshore energy business corporate

The AS handle DODI-01 is held by Diamond Offshore, LLC.

What it's used for

  • The address space carries corporate infrastructure for an offshore energy services provider, evidenced by the netname DOL-43 and registrant Diamond Offshore, LLC.
  • The AS announces a single IPv4 prefix, 216.120.136.0/24, comprising 256 addresses, with 0 IPv6 prefixes.
  • With only 1 observed neighbour, the low address-to-neighbour ratio indicates a small, self-contained internal corporate estate rather than a transit or access network.

Notable

  • The RDAP registrant Diamond Offshore, LLC matches the registry holder and announcer, confirming consistent ownership of the address space.
  • The inventory consists of a single /24 block, representing a finely subdivided internal corporate estate typical of site-by-site segmentation for a specialized industrial operator.

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

Full topology · Graph

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.

ASNetworkPaths seen
AS394437PS Lightwave56

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-08, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 1 prefixes · 256 addresses IPv6 0 prefixes

CountryNamePrefixes
USUnited States of America1

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS25811
Registry name
DODI-01
Registrant
Diamond Offshore, LLC
Abuse contact
arin@noblecorp.com
Registered
2024-01-16
Last changed
2024-01-16
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 1 with no ROA
ROAs
0 authorising AS25811
ASPA
no ASPA record
IRR
100% registered · 1 of 1 announcements
Route objects
1 naming AS25811

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: 455 networks and 1,854 prefixes, as published 2026-11-09. 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

Cross-check