My IP: - IP Address Lookup

The IP address location of is Madrid 28001, Madrid (MD), Spain (ES). is a public IP address that belongs to ASN 15704 which is under the control of Xtra Telecom S.A.. The prefix 081/8 ( was allocated to RIPE NCC by the Internet Assigned Numbers Authority (IANA) in . IP Address Location

Here you will find the approximate IP geolocation for as reported by our IP Tracker along with additional information like ASN mapping, ISP, and the type of internet connection. Use the free IP Lookup tool to find the IP geolocation for any public IP address.

IP PTR / DNS Reverse
IP Address ASN15704 (Xtra Telecom S.A.)
IP Address ISPXtra Telecom SA
IP OrganizationIbercom Telecom
IP Connection TypeCable/DSL [internet speed test]
IP Location ContinentEurope
IP Location CountrySpain (ES)
IP Location StateMadrid (MD)
IP Location CityMadrid
IP Location Postcode28001
IP Location Latitude40.4167 / 40°25′0″ N
IP Location Longitude-3.6838 / 3°41′1″ W
IP Location TimezoneEurope/Madrid
IP Location Local Time

IANA IPv4 Address Space Allocation for Subnet

The Internet Assigned Numbers Authority (IANA) is responsible for global IP address space allocation to Regional Internet Registries (RIRs). The available IPv4 address space is typically allocated to RIRs as /8 prefix blocks, and the RIRs delegate smaller blocks of their address pools to Local Internet Registries (LIRs) like Internet Service Providers and other organizations in their designated locations.

IPv4 Address Space Prefix081/8
Regional Internet Registry (RIR)RIPE NCC
Allocation Date
RDAP Server
Delegated entirely to specific RIR (Regional Internet Registry) as indicated. Reverse IP Lookup

Reverse IP address lookup is the process of mapping an IP address to its corresponding hostnames. Below you will find a list of hostnames that resolve to IP address


Find all Reverse IP Hosts for IP Address Representations

An IPv4 address is defined as a 32-bit number, and thus it can be written in any notation that is capable of representing a 32-bit integer value. If human-readability is a requirement, IPv4 addresses are most often expressed in quad-dotted decimal notation with 4 octets ranging from 0 to 255 each.
Note: You should avoid IP addresses with zero-padded decimal octets like or because they might impose an ambiguity with octal numbers.
Below you can find some ways to express an IPv4 address.

CIDR Notation81.0.4.123/32
Decimal Notation1358955643
Hexadecimal Notation0x5100047b
Octal Notation012100002173
Binary Notation 1010001000000000000010001111011
Dotted-Decimal Notation81.0.4.123
Dotted-Hexadecimal Notation0x51.0x00.0x04.0x7b
Dotted-Octal Notation0121.00.04.0173
Dotted-Binary Notation01010001.00000000.00000100.01111011 Common Typing Errors

You might encounter misspelled IP addresses containing "o", "l" or "I" characters instead of digits. The following list includes some typical typing errors for

  • 81.o.4.123

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