Autonomous system
AS21581 M5HOSTING
Hosting ARIN
Summary
M5 Computer Security
hosting security business
The AS handle M5HOSTING is held by M5 Computer Security.
What it's used for
- The address space carries security and hosting infrastructure, evidenced by netnames such as
M5-SECURITY-NETBLK-5andM5-IPV4-01. - The network announces 4352 IPv4 addresses across 16 prefixes and 29 IPv6 prefixes, with only 3 observed neighbours, indicating a hosting or business network rather than a transit provider.
Notable
- Registrants for the majority of prefixes are M5 Computer Security, though one prefix (38.96.14.0/24) is registered to Cogent Communications, LLC.
- The address inventory is subdivided into multiple /24 blocks and a /23, suggesting a structured corporate or service-oriented estate.
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 2026-10-14, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 17 prefixes · 4.86K addresses IPv6 29 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 46 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS21581- Registry name
- M5HOSTING
- Registrant
- M5 Computer Security
- Abuse contact
- abuse@m5hosting.com
- Registered
- 2008-05-28
- Last changed
- 2012-03-02
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 96% valid · 22 valid, 1 with no ROA
- ROAs
- 26 authorising AS21581
- ASPA
- no ASPA record
- IRR
- 96% registered · 22 of 23 announcements
- Route objects
- 18 naming AS21581
Reputation
Classification and threat
Hosting Datacenter or cloud provider. Addresses are servers, not people.
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 1,771 prefixes, as published 2026-10-15. 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