Autonomous system
AS15450 ALHAMBRA Tlfo: +34 917 872 300
Unclassified RIPE
Summary
Alhambra Systems
business enterprise hosting infrastructure
The AS handle contains a telephone number, complete with international dialling prefix.
What it's used for
- An information technology services company. Eleven IPv4 prefixes and one IPv6
/32announced from Spain, seven thousand addresses, across four observed BGP neighbours.
Notable
- The handle field holds the company name and then a switchboard number with a country dialling prefix and spaced groups of digits, in a field meant for an identifier.
- Seven blocks follow one netname pattern of country code, company and allocation date, the oldest from the mid-nineties and the newest a decade and a half later.
- Four blocks belong to entirely different companies: a credit reference agency under another country's code, a property valuation firm, a company under a name about worldwide services, and a data centre operator.
- The two answering addresses use three letters and the last two octets padded with zeroes, under a shortened form of the company domain.
- Eighteen addresses were queried for reverse DNS and two returned a name.
Interesting
- A phone number in a registry field is a person filling in a form the way they would fill in a business card. It is also the only contact detail here that a human could actually use.
- Four other companies' blocks announced from one number is a hosting relationship, and the registries involved are not all the same one, which means the customers came from different places.
- Zero padding the octets keeps every name the same length, so names sort as neatly as addresses do.
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 2026-10-18, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 11 prefixes · 7.17K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| ES | Spain | 12 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS15450- Registry name
- ALHAMBRA
- Registrant
- MNT-ALHAMBRAEIDOS
- Abuse contact
- equipo.icm@a-e.es
- Registered
- 1970-01-01
- Last changed
- 2025-10-23
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 88% valid · 29 valid, 4 with no ROA
- ROAs
- 29 authorising AS15450
- ASPA
- no ASPA record
- IRR
- 100% registered · 33 of 33 announcements
- Route objects
- 36 naming AS15450
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: 443 networks and 1,784 prefixes, as published 2026-10-19. 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