Autonomous system
AS27357 RACKSPACE
Hosting ARIN
Summary
Rackspace Hosting
cloud hosting managed-hosting
One of the Autonomous Systems of Rackspace, a San Antonio, Texas managed cloud and hosting provider. Handle RACKSPACE.
What it's used for
- Managed hosting, dedicated servers, and cloud infrastructure operated on behalf of Rackspace's business customers.
Notable
- An IP here identifies Rackspace as the host, not the operator of whatever runs on it.
- Rackspace announces prefixes from several ASNs (e.g. AS33070, AS22720); which one carries a given block varies by region and history.
Interesting
- Rackspace was an early managed-hosting pioneer and co-founded the OpenStack cloud project with NASA in 2010.
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, 1 downstream and 3 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS12200 | Rackspace Hosting | 2,196 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-15, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 42 prefixes · 263K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 43 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS27357- Registry name
- RACKSPACE
- Registrant
- Rackspace Hosting
- Abuse contact
- abuse@rackspace.com
- Registered
- 2003-02-20
- Last changed
- 2012-02-24
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 3% valid · 1 valid, 39 with no ROA
- ROAs
- 1 authorising AS27357
- ASPA
- no ASPA record
- IRR
- 95% registered · 38 of 40 announcements 1 other origin
- Route objects
- 97 naming AS27357
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 1,781 prefixes, as published 2026-10-16. 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