38.100.21.65 - IP Address Lookup

The IP address location of 38.100.21.65 is Washington 20001, District of Columbia (DC), United States (US).

38.100.21.65 is a public IP address that belongs to ASN 174 which is under the control of Cogent Communications. The prefix 038/8 (38.0.0.0/8) was allocated to PSINet, Inc. by the Internet Assigned Numbers Authority (IANA) in .

38.100.21.65 IP Address Location

Here you will find the approximate IP geolocation for 38.100.21.65 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 Address ASN174 controlled by Cogent Communications
IP ISP / OrganizationCogent Communications
IP Connection TypeCable/DSL [internet speed test]
IP Location ContinentNorth America
IP Location CountryUnited States (US)
IP Location StateDistrict of Columbia (DC)
IP Location CityWashington
IP Location Postcode20001
IP Location Latitude38.9085 / 38°54′30″ N
IP Location Longitude-77.0177 / 77°1′3″ W
IP Location TimezoneAmerica/New_York
IP Location Local Time

IANA IPv4 Address Space Allocation for Subnet 38.0.0.0/8

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 Prefix038/8
Regional Internet Registry (RIR)PSINet, Inc.
Allocation Date
WHOIS Serverwhois.arin.net
RDAP Serverhttps://rdap.arin.net/registry, http://rdap.arin.net/registry
StatusLEGACY
Allocated by the central Internet Registry (IR) prior to the Regional Internet Registries (RIRs). This address space is now administered by individual RIRs as noted, including maintenance of WHOIS Directory and reverse DNS records. Assignments from these blocks are distributed globally on a regional basis.

38.100.21.65 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 038.100.021.065 or 010.010.010.010 because they might impose an ambiguity with octal numbers.
Below you can find some ways to express an IPv4 address.

Decimal Notation644093249
Hexadecimal Notation0x26641541
Octal Notation04631012501
Binary Notation 100110011001000001010101000001
Dotted-Decimal Notation38.100.21.65
Dotted-Hexadecimal Notation0x26.0x64.0x15.0x41
Dotted-Octal Notation046.0144.025.0101
Dotted-Binary Notation00100110.01100100.00010101.01000001

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