Autonomous system
AS15685 CASABLANCA-AS Internet & Collocation Provider
Hosting RIPE
Summary
Casablanca INT
isp hosting telecom business
The reverse DNS says which addresses are assigned and which are not.
What it's used for
- A provider and colocation operator. Fifty-seven IPv4 prefixes and one IPv6 prefix announced from Czechia, thirty-one thousand addresses, across twenty-eight observed BGP neighbours.
Notable
- Answering names begin with a word for the address's state:
assigned-on some,unassigned-on others, alongsidenet-,bcast-andhost-for the structural addresses of each subnet. - Those names sit on four different domains, only one of which is the operator's own.
- The separators are inconsistent between them. Some write the four octets hyphenated, some keep the dots, and some pad the final octet to three digits.
- The AS handle continues past the abbreviation into a description of the business, spelling the word for shared rack space with a doubled letter.
- The netnames are a country code, the brand and an allocation date, with four different dates across the blocks, and every one lists a contact naming the registry itself.
- Eighteen addresses were queried and thirteen returned a name.
Interesting
- Publishing which addresses are unassigned is a free inventory of a network's spare capacity. It is generated automatically from the same records that produce the assigned names, and nobody decided to publish it so much as failed to decide not to.
- Fifty-seven routes for thirty-one thousand addresses is a network assembled from many small pieces over two decades, each announced as it arrived.
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
Recorded at 1 exchange in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| NIX.CZ - Neutral Internet eXchange for the Czech Republic | Prague, Czech Republic | 91.210.16.15 |
Transit providers
7 upstream, 7 downstream and 21 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-13, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 57 prefixes · 31.23K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| CZ | Czechia | 58 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS15685- Registry name
- CASABLANCA-AS
- Registrant
- CASABLANCA-CORE-MNT
- Abuse contact
- abuse@casablanca.cz
- Registered
- 2002-09-24
- Last changed
- 2026-08-10
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 60 valid, 0 with no ROA
- ROAs
- 78 authorising AS15685
- ASPA
- 3 declared providers
- IRR
- 100% registered · 60 of 60 announcements
- Route objects
- 197 naming AS15685
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: 436 networks and 1,771 prefixes, as published 2026-10-13. 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