$ query “AS721” --type=asn → 1 result(s)
AS721 — DNIC-ASBLK-00721-00726
United States Department of Defense (DoD)
AS721 is a government access provider run by United States Department of Defense (DoD), established in the United States. The network announces a whopping 72.2 million IPv4 addresses (1.95% of routable IPv4 space), including a /8. Supports IPv6.
- Space Overlord — Over 10 million IPv4 addresses
Basic Information
- Country
- 🇺🇸 United States
- Category
- Government/Public Administration
- Network Role
- Access Provider
- Data Origin
- Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
- Last Changed
- March 04, 2026
- Last Seen
- March 04, 2026
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 228 / 183
- IPv6 Prefixes (raw / aggregated)
- 2 / 1
- IPv4 Addresses
- 72 229 632
- Largest IPv4 Prefix
- /8 (16 777 216 addresses)
- Largest IPv6 Prefix
- /31
- Geolocated Countries
- 🇺🇸 US (192 IPs), 🇦🇺 AU (22 IPs)
- Prefix Changed
- March 04, 2026
Reputation
- Reputation
- Good — 1 flagged IPs out of 72 229 632 total (0.00%)
- Open Proxies
- 1 known open proxies in this network
Connectivity Summary
- Upstream Providers
- 1 upstream autonomous systems providing transit
- Peers
- 0 autonomous systems exchanging traffic without transit fees
- Downstream Customers
- 3 downstream autonomous systems buying transit
- Degree
- 4 unique BGP neighbors (providers + customers + peers)
- Reach
- 156 — customer cone size measuring network influence
- Degree Rank
- #17 142
- Reach Rank
- #886
Upstream Providers (1)
- AS3356 — LEVEL3 (Tier-1 transit)
Prefix Lists
IPv4 Prefixes (228 total)
- 55.0.0.0/8 (16 777 216 addresses)
- 214.0.0.0/8 (16 777 216 addresses)
- 215.0.0.0/9 (8 388 608 addresses)
- 132.0.0.0/10 (4 194 304 addresses)
- 131.32.0.0/11 (2 097 152 addresses)
- 132.96.0.0/11 (2 097 152 addresses)
- 205.64.0.0/11 (2 097 152 addresses)
- 132.80.0.0/12 (1 048 576 addresses)
- 132.128.0.0/12 (1 048 576 addresses)
- 138.144.0.0/12 (1 048 576 addresses)
- 131.64.0.0/13 (524 288 addresses)
- 137.0.0.0/13 (524 288 addresses)
- 138.136.0.0/13 (524 288 addresses)
- 143.144.0.0/13 (524 288 addresses)
- 158.0.0.0/13 (524 288 addresses)
- 160.136.0.0/13 (524 288 addresses)
- 160.144.0.0/13 (524 288 addresses)
- 205.56.0.0/13 (524 288 addresses)
- 205.96.0.0/13 (524 288 addresses)
- 131.76.0.0/14 (262 144 addresses)
- 131.80.0.0/14 (262 144 addresses)
- 136.212.0.0/14 (262 144 addresses)
- 136.216.0.0/14 (262 144 addresses)
- 137.8.0.0/14 (262 144 addresses)
- 137.240.0.0/14 (262 144 addresses)
- 138.164.0.0/14 (262 144 addresses)
- 138.168.0.0/14 (262 144 addresses)
- 140.152.0.0/14 (262 144 addresses)
- 143.140.0.0/14 (262 144 addresses)
- 144.100.0.0/14 (262 144 addresses)
- 144.104.0.0/14 (262 144 addresses)
- 153.24.0.0/14 (262 144 addresses)
- 155.152.0.0/14 (262 144 addresses)
- 155.216.0.0/14 (262 144 addresses)
- 158.8.0.0/14 (262 144 addresses)
- 158.236.0.0/14 (262 144 addresses)
- 158.240.0.0/14 (262 144 addresses)
- 205.104.0.0/14 (262 144 addresses)
- 131.4.0.0/15 (131 072 addresses)
- 131.74.0.0/15 (131 072 addresses)
- 131.86.0.0/15 (131 072 addresses)
- 136.220.0.0/15 (131 072 addresses)
- 138.160.0.0/15 (131 072 addresses)
- 138.178.0.0/15 (131 072 addresses)
- 141.234.0.0/15 (131 072 addresses)
- 143.84.0.0/15 (131 072 addresses)
- 143.138.0.0/15 (131 072 addresses)
- 143.156.0.0/15 (131 072 addresses)
- 143.212.0.0/15 (131 072 addresses)
- 144.182.0.0/15 (131 072 addresses)
IPv6 Prefixes (2 total)
- 2608:120::/31