IPv4 address
81.46.203.183
An address in Madrid, Spain, used by TELEFONICA DE ESPANA S.A.U., announced by acens Technologies, S.L. (AS16371). It's hosting space of acens and a mail server on port 587.
Summary
Geolocation
Where the address is, and what that place uses.
- City
- Madrid
- Region
- Madrid
- Postal code
- 28004
- Country
- Spain
- Continent
- Europe
- Coordinates
- 40.4165, -3.7026
- Timezone
- Europe/Madrid
Ownership
Who holds the address: the AS announcing it, the registry record, the abuse contact and its name in DNS.
- Company
- TELEFONICA DE ESPANA S.A.U.
- Domain
- telefonica.es
- Type
- ISP
- Registered in
- Spain
- Name
- ACENS-TELEFONICA
- Network name
- VCL-TP-11
- Organization
- ORG-ACET1-RIPE
- Status
- ASSIGNED PA
- Registry
- RIPE NCC
- Domain
- acens.net
- Abuse
- abuse@acens.net
- Name
- ACENS Telefonica
- abuse@acens.net
- Address
- San Rafael 14, 28108 Alcobendas - Madrid, Spain
- Network
- 81.46.203.0-81.46.203.255
Not seen inIP RWHOIS
Anonymity
Whether the address hides someone else: a VPN, Tor, a relay, a proxy pool, or a hosting range.
Network
What kind of network it is on: a mobile carrier, a satellite operator, an anycast service, a CDN edge.
Services
What our own internet-wide measurement found listening on it.
- Port
- 587
- Banner
- 220 centos.intelibit.com ESMTP Postfix
- Greeting
- Completed
- First seen
- 2026-07-28
- Last seen
- 2026-09-08
00 · Evaluate
Test the real build first.
An evaluation license puts a full current build in your hands, with no sampling, so you can measure it against your own traffic before anyone talks about terms.
01 · License
Then license what you use.
Standard, for detection and decisions inside your own product and operations.
Redistribution, when the data ships onward inside what you sell, priced by scope rather than by seat.
Annual terms, a named contact, and monthly, quarterly or yearly payment.