Autonomous system
AS11135 CROSS-DEVELOPMENT-MONTGOMERY
Hosting ARIN
Summary
Cross Development/Montgomery LP (Westland Bunker)
hosting enterprise legacy
CROSS-DEVELOPMENT-MONTGOMERY is the routing identity of the Westland Bunker, a hardened colocation and disaster-recovery data centre at 550 Club Dr, Montgomery, Texas, north of Houston. The ARIN registrant is the property partnership, Cross Development/Montgomery LP, but every contact on the record — abuse, admin, NOC, tech — is @westlandbunker.com, which is what actually operates the network.
What it's used for
Colocation and managed hosting. RIS observes 8 IPv4 prefixes totalling roughly 3,840 addresses, no IPv6, and only 3 BGP neighbours. That is a customer-edge shape, not a carrier: the facility is carrier-neutral and multihomes to a handful of on-site providers rather than selling transit itself. Reverse DNS on the sampled addresses is exactly what a colo looks like from the outside — rscorp.westlandbunker.com on the operator's own 199.102.136.0/21, and tenant names such as ptr.truewater.com and www.texasliquids.com on the smaller blocks.
Notable
The prefix registrants are worth reading carefully, because at a glance they look scattered: TWTC-NETBLK-12 (Time Warner Telecom) on the 209.163.230.0/24 and .231.0/24, SUDDE (Suddenlink) on the two 173.219.x /24s, and direct ARIN reassignments on the 65.59.x and 66.193.x blocks. These are ordinary provider-assigned blocks from the carriers feeding the building, all ARIN, all US — the untidy-but-legitimate pattern of a facility that has accumulated address space from successive on-site transit providers, not the multi-RIR third-party registrant pattern of a leased-address broker.
Interesting
The building is a former 1982 nuclear fallout shelter, roughly 38,000 sq ft of data centre space some 55 feet underground, later fitted out as a Tier III facility.
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 2026-10-25, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 6 prefixes · 3.84K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 6 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS11135- Registry name
- CROSS-DEVELOPMENT-MONTGOMERY
- Registrant
- Cross Development/Montgomery LP
- Abuse contact
- abuse@westlandbunker.com
- Registered
- 2005-08-08
- Last changed
- 2012-03-02
- Allocation
- assigned
Declared
PeeringDB profile
- Name
- Cross Development/Montgomery LP
- Scope
- Not Disclosed
- Traffic ratio
- Not Disclosed
- Website
- https://datajourney.com
PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.
Routing security
RPKI and IRR
- RPKI
- 50% valid · 4 valid, 4 with no ROA
- ROAs
- 5 authorising AS11135
- ASPA
- no ASPA record
- IRR
- 100% registered · 8 of 8 announcements
- Route objects
- 8 naming AS11135
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: 443 networks and 1,779 prefixes, as published 2026-10-24. 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