Autonomous system
AS12257 EMC-AS12257
Unclassified ARIN
Summary
Dell (EMC)
enterprise legacy
A Dell corporate network, inherited from EMC and still registered under the EMC name.
What it's used for
- Internal enterprise networking for the storage and infrastructure side of Dell, the part of the company that was EMC before the 2016 acquisition.
Notable
- The AS handle is
EMC-AS12257and the netnames readEMC-B2andEMC-B5, but every registrant is Dell, Inc. Dell bought EMC in what was then the largest technology acquisition ever made, and a decade later the network still carries the acquired company's naming with the buyer's name on the paperwork. - 36 IPv4 prefixes for only 16,000 addresses, against 14 observed BGP neighbours. Finely subdivided space with a moderate number of adjacencies — a large distributed corporate network rather than a service provider.
- Most of it comes out of
128.221.0.0/16, a legacy class B that EMC held from early on.
Interesting
- One block breaks the naming pattern entirely with the netname
DGPDN3, unrelated to theEMC-Bseries around it. Corporate networks accumulate these: a block requested by one team, under one convention, that nobody ever went back to align with the rest.
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
15 upstream, 0 downstream and 18 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 2026-10-16, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 36 prefixes · 16.13K addresses IPv6 4 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 40 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS12257- Registry name
- EMC-AS12257
- Registrant
- Dell, Inc.
- Abuse contact
- ipregistrars.abuse@dell.com
- Registered
- 1999-05-03
- Last changed
- 2023-03-20
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 4% valid · 3 valid, 64 with no ROA
- ROAs
- 3 authorising AS12257
- ASPA
- no ASPA record
- IRR
- 91% registered · 61 of 67 announcements 2 other origin
- Route objects
- 114 naming AS12257
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 1,783 prefixes, as published 2026-10-17. 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