- IP Address Lookup

The IP address location of is Sunnyvale 94086, California (CA), United States (US). is a public IP address that belongs to ASN 26101 which is under the control of Yahoo!. The address resides in the IP address range - (CIDR notation:, and the whole subnet spans a total number of 8,192 individual IP addresses. The prefix 066/8 ( was allocated to ARIN 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 Lookupmta-v42.mail.vip.bf1.yahoo.com
IP Address ASN26101 controlled by Yahoo!
IP ISP / OrganizationYahoo!
IP Connection TypeCorporate [internet speed test]
IP Location ContinentNorth America
IP Location CountryUnited States (US)
IP Location StateCalifornia (CA)
IP Location CitySunnyvale
IP Location Postcode94086
IP Location Latitude37.3697 / 37°22′10″ N
IP Location Longitude-122.0214 / 122°1′17″ W
IP Location TimezoneAmerica/Los_Angeles
IP Location Local Time WHOIS IP Lookup

This section provides the IP WHOIS record for IPv4 address which shows who is responsible for the corresponding IP subnet. Use our WHOIS IP Lookup tool to find the IP WHOIS record for any IPv4 or IPv6 address.

IP Address Range66.218.64.0 -
Number of IP Addresses8,192
IP Subnet66.218.64.0/19 [subnet calculator]
IP WHOIS Network NameA-YAHOO-U23
IP WHOIS Network HandleNET-66-218-64-0-1
IP WHOIS Network TypeDirect Allocation
IP WHOIS Registration Date
IP WHOIS Modification Date
IP WHOIS Net Referencehttps://whois.arin.net/rest/net/NET-66-218-64-0-1
IP WHOIS RegistrantYahoo! (YAOO)
701 First Ave
Sunnyvale CA 94089
United States (US)

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 Prefix066/8
Regional Internet Registry (RIR)ARIN
Allocation Date
WHOIS Serverwhois.arin.net
RDAP Serverhttps://rdap.arin.net/registry, http://rdap.arin.net/registry
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

  • mta-v42.mail.vip.bf1.yahoo.com
  • mta5.am0.yahoodns.net
  • mta6.am0.yahoodns.net
  • mta7.am0.yahoodns.net 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.

Decimal Notation1121605003
Hexadecimal Notation0x42da558b
Octal Notation010266452613
Binary Notation 1000010110110100101010110001011
Dotted-Decimal Notation66.218.85.139
Dotted-Hexadecimal Notation0x42.0xda.0x55.0x8b
Dotted-Octal Notation0102.0332.0125.0213
Dotted-Binary Notation01000010.11011010.01010101.10001011

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