Autonomous system
AS51681 DATIUM
Residential RIPE
Summary
Datium
isp residential cable dsl
DATIUM is operated by Sineasen S.L.
What it's used for
- The address space carries residential access traffic, evidenced by reverse DNS entries such as
user.dynamic.ibericaderedes.esandstatic.datium.es, and netnames includingDynamicIP_Telcat_FTTH_ADSL. - The AS announces 6144 IPv4 addresses across 5 prefixes and maintains 17 observed neighbours, a ratio consistent with an access network providing last-mile connectivity.
- Traffic from this AS consists of subscriber eyeballs for cable and DSL services, as indicated by the PeeringDB classification of Cable/DSL/ISP and the dynamic/static host naming conventions.
Notable
- Registrants vary across prefixes, including
SINEASEN S.L.,AVATEL TELECOM, SA, andTelefonia i Dades de Catalunya S.L., suggesting the AS aggregates space from multiple entities or reflects historical acquisitions. - The inventory is composed of five distinct IPv4 blocks, with the largest being
178.239.208.0/20, and no IPv6 prefixes are currently announced.
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 2 exchanges in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| DE-CIX Madrid | Madrid, Spain | 185.1.192.40 |
| ESpanix Madrid Lower LAN | Madrid, Spain | 193.149.1.153 |
Transit providers
6 upstream, 0 downstream and 6 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 2026-10-10, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 5 prefixes · 6.14K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| ES | Spain | 5 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS51681- Registry name
- DATIUM
- Registrant
- CARRIERENABLER-MNT
- Abuse contact
- ripe@carrier-enabler.com
- Registered
- 2010-10-19
- Last changed
- 2021-05-06
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 22% valid · 2 valid, 7 with no ROA
- ROAs
- 6 authorising AS51681
- ASPA
- no ASPA record
- IRR
- 100% registered · 9 of 9 announcements
- Route objects
- 12 naming AS51681
Reputation
Classification and threat
Residential Fixed-line consumer ISP. Addresses here are homes.
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: 431 networks and 1,775 prefixes, as published 2026-10-11. 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