Autonomous system
AS21782 PLATEAU
Unclassified ARIN
Summary
Plateau Telecommunications
cable dsl isp residential
The AS handle PLATEAU is held by Plateau Telecommunications Incorporated.
What it's used for
- The address space carries residential and business access traffic, evidenced by reverse DNS records pointing to
plateautel.netand netnames such asPLATEAU-INTERNET-NETWORKandEPT-5. - The AS announces 47,872 IPv4 addresses across 18 prefixes and 1 IPv6 prefix, while maintaining 15 observed neighbours; this ratio of high address volume to moderate peering suggests an access network providing last-mile connectivity.
Notable
- All registrants for the sampled prefixes are Plateau Telecommunications Incorporated, consistent with the AS announcer.
- The inventory consists of a mix of /19, /20, /21, /22, /23, and /24 blocks, indicating a fragmented but substantial address estate typical of a regional ISP.
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 2026-10-16, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 18 prefixes · 47.87K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 19 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS21782- Registry name
- PLATEAU
- Registrant
- Plateau Telecommunications Incorporated
- Abuse contact
- networkengineering@plateautel.com
- Registered
- 2001-06-20
- Last changed
- 2013-03-14
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 81% valid · 17 valid, 4 with no ROA
- ROAs
- 17 authorising AS21782
- ASPA
- no ASPA record
- IRR
- 95% registered · 20 of 21 announcements
- Route objects
- 21 naming AS21782
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