All ASNs

Autonomous System details for AS27066

AS27066
United States Department of Defense (DoD) • mail.mil

AS27066 — United States Department of Defense (DoD)

AS Name
DNIC-ASBLK-27032-27159
Country
United States (US)
Website
Number of IPv4
36,864
Number of IPv6
9.67 × 1024
ASN type
Government
Status
Assigned
Registry
ARIN
Allocated
January 16, 2003
Last updated
September 12, 2025

IP Ranges

107 IPv4 prefixes, 8 IPv6 prefixes
Prefix Company Number of IPs
134.229.134.0/24 Department of Immigration 256
134.229.136.0/24 Department of Immigration 256
134.229.176.0/24 Department of Immigration 256
134.229.177.0/24 Department of Immigration 256
134.229.178.0/24 Department of Immigration 256
139.241.74.0/24 256
139.241.76.0/22 1,024
139.241.129.0/24 256
139.241.131.0/24 256
139.241.132.0/24 256
139.241.133.0/24 256
139.241.134.0/24 256
139.241.137.0/24 256
139.241.139.0/24 256
139.241.147.0/24 256
139.241.148.0/24 256
139.241.150.0/24 256
139.241.234.0/23 512
139.242.12.0/24 256
139.242.51.0/24 256
155.7.180.0/24 Department of Immigration 256
156.112.113.0/24 256
156.112.114.0/24 256
156.112.135.0/24 256
156.112.166.0/24 256
156.112.167.0/24 256
159.77.33.0/24 Department of Immigration 256
159.77.34.0/24 Department of Immigration 256
159.77.35.0/24 Department of Immigration 256
159.77.44.0/24 Department of Immigration 256
159.77.45.0/24 Department of Immigration 256
159.77.79.0/24 Department of Immigration 256
159.77.80.0/24 Department of Immigration 256
159.77.81.0/24 Department of Immigration 256
159.77.84.0/24 Department of Immigration 256
159.77.85.0/24 Department of Immigration 256
159.77.104.0/24 Department of Immigration 256
159.77.105.0/24 Department of Immigration 256
159.77.106.0/23 Department of Immigration 512
163.251.0.0/24 256
163.251.96.0/22 1,024
163.251.101.0/24 256
163.251.104.0/24 256
163.251.105.0/24 256
163.251.112.0/24 256
163.251.113.0/24 256
163.251.128.0/24 256
163.251.129.0/24 256
163.251.160.0/24 256
163.251.161.0/24 256
163.251.184.0/24 256
163.251.185.0/24 256
163.251.208.0/24 256
163.251.209.0/24 256
163.251.239.0/24 256
163.251.244.0/22 1,024
163.251.248.0/24 256
163.251.254.0/24 256
192.58.181.0/24 Various Registries (Maintained by ARIN) 256
192.108.98.0/24 Various Registries (Maintained by ARIN) 256
192.153.245.0/24 Various Registries (Maintained by ARIN) 256
192.231.128.0/24 Various Registries (Maintained by ARIN) 256
199.31.130.0/24 256
199.31.131.0/24 256
199.32.31.0/24 256
204.34.155.0/24 256
205.56.194.0/24 256
205.68.64.0/24 256
205.100.3.0/24 256
206.37.138.0/23 512
207.132.100.0/24 256
209.22.103.0/24 256
214.4.241.0/24 256
214.16.244.0/24 256
214.16.245.0/24 256
214.23.244.0/24 256
214.23.245.0/24 256
214.23.246.0/24 256
214.24.182.0/24 256
214.24.215.0/24 256
214.29.156.0/22 1,024
214.38.198.0/23 512
214.48.8.0/24 256
214.48.12.0/22 1,024
214.48.72.0/22 1,024
214.48.76.0/22 1,024
214.48.108.0/22 1,024
214.48.116.0/22 1,024
214.51.109.0/24 256
214.51.110.0/24 256
214.54.128.0/22 1,024
214.54.133.0/24 256
214.54.135.0/24 256
214.54.136.0/24 256
214.54.140.0/24 256
214.72.4.0/24 256
214.72.5.0/24 256
214.72.6.0/24 256
214.72.14.0/24 256
214.72.15.0/24 256
2608:c101:1::/48 United States Department of Defense (DoD) 1.21 × 1024
2608:c102:1b83::/48 United States Department of Defense (DoD) 1.21 × 1024
2608:c143:1::/48 United States Department of Defense (DoD) 1.21 × 1024
2608:c143:46a3::/48 United States Department of Defense (DoD) 1.21 × 1024
2608:c144:2738::/48 United States Department of Defense (DoD) 1.21 × 1024
2608:c182::/48 United States Department of Defense (DoD) 1.21 × 1024
2608:c182:3cc7::/48 United States Department of Defense (DoD) 1.21 × 1024
2608:c183:1::/48 United States Department of Defense (DoD) 1.21 × 1024

This table only shows the first 100 of the set of IPv4 and IPv6 prefixes. All data is available via our IP data API.

IP ranges are the different blocks of IP addresses advertised by an Autonomous System (AS). These ranges can be used by the same organization operating the AS, or by different organizations.

Peers of AS27066

0 peers

AS27066 has no peers recorded.

Peering is a direct, often free, traffic exchange between Autonomous Systems (ASNs). They share routes only to their own networks and customers, making connections faster and cheaper for that specific traffic, without providing full internet access to each other.

Upstreams of AS27066

2 upstreams
AS721 AS27064

AS27066 uses these Autonomous Systems as its upstreams.

An upstream (or transit provider) is another AS that AS27066 pays for full internet connectivity, allowing it to reach all global destinations and be reachable by them.

Downstreams of AS27066

30 downstreams
AS306 AS316 AS321 AS337 AS399 AS405 AS409 AS427 AS619 AS637 AS647 AS665 AS747 AS1516 AS1600 AS1637 AS1649 AS1908 AS3916 AS3954 AS5284 AS5860 AS5927 AS5958 AS5972 AS5982 AS27046 AS27137 AS27149 AS27153

AS27066 provides internet connectivity to these downstream Autonomous Systems.

A downstream is a customer Autonomous System that pays another AS (its provider) for internet access. The provider AS carries the downstream's traffic and makes its network reachable.

Our IP address tools

Explore all tools

What is my IP?

Discover your public IP address and detailed information about your connection.

Check your IP address details

CIDR to IP Range Converter (IPv4 and IPv6)

Convert CIDR notation to IP address ranges and vice versa. Useful for network configuration and security.

Use the CIDR to IP Range Converter

IP to Hostname/rDNS Lookup

Perform a reverse DNS (rDNS) lookup to get the hostname for an IP address.

Look up an IP address’s hostname

IPv6 Expander/Collapser

Expand or collapse IPv6 addresses to their full or shortened forms for better readability and usage.

Expand or collapse IPv6 addresses