AS721 · 
US — United States Department of Defense (DoD)
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DNIC-ASBLK-00721-00726 · ARIN · US
Selected local snapshot coverage; not the whole Internet. BGP snapshots: ris-rrc00 11 Oct 08:00 UTC; routeviews2 11 Oct 08:00 UTC; routeviews6 11 Oct 08:00 UTC. Validator: 11 Oct 09:23 UTC. Publication-point issues: 89
Address space details
Overlapping originated prefixes counted once. IPv4 addresses: 72,010,240
IPv6 addresses: 158456325028528675187087900672
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Observed originated prefixes
These are observed BGP origins, not an inventory of registered allocations or transit reachability.
0 matching prefix–origin pairs. Each pair appears once; source observations are in Details.
No matching route was observed in the available dataset.
AS connectivity
4 unique neighbors in the selected local snapshots. This is the available collector dataset, not a complete map of the Internet. Adjacency does not establish upstream service or peering.
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Darker nodes = larger inferred customer cone. CAIDA IPv4 customer cone (includes the AS itself); unknown / IPv6 cone is gray.
Arrow = provider → customer, not traffic direction. Purple: provider/customer · teal: peer · gray: unknown/mixed. Solid: observed BGP adjacency · dashed: inferred only. A graph path is not an observed BGP route or a promise of transit.
4 matching neighbors · 1–4 shown
| Network | IPv4/IPv6 | Seen in | Last observed | Details |
|---|---|---|---|---|
AS3356 · US Level 3 Parent, LLC | IPv4, IPv6 | ris-rrc00, routeviews2, routeviews6 | 11 Oct 08:00 UTC | Source observations
|
AS27064 · US DNIC-ASBLK-27032-27159 - United States Department of Defense DoD | IPv4, IPv6 | ris-rrc00, routeviews2, routeviews6 | 11 Oct 08:00 UTC | Source observations
|
AS27065 · US DNIC-ASBLK-27032-27159 - United States Department of Defense DoD | IPv4, IPv6 | ris-rrc00, routeviews2, routeviews6 | 11 Oct 08:00 UTC | Source observations
|
AS27066 · US DNIC-ASBLK-27032-27159 - United States Department of Defense DoD | IPv4, IPv6 | ris-rrc00, routeviews2, routeviews6 | 11 Oct 08:00 UTC | Source observations
|
Peering & locations
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Registry information
ARIN · fetched 11 Oct 04:42 UTC
- Resource name
- DNIC-ASBLK-00721-00726
- Handle
- AS721
- RDAP country
- Not supplied
- ASN
- 721
- ASN range end
- 726
Registered organizations
Last Changed: 12 Sep 2025 14:00 UTC
Allocation statistics
NRO/RIR delegated-extended records describe allocation or assignment ranges. They do not prove a BGP announcement or replace more-specific RDAP registration information. Country is the allocation record’s registration country, not the physical location of every address.
- AS721–AS726 · arin · assigned · ASN allocation country: US · Allocation date: Not supplied — NRO/RIR data · snapshot 10 Oct 00:00 UTC
Prefix count history
Local observation changes
Only comparable successful snapshots are compared. First imports, changed peer coverage and collection gaps are baselines, not new global routes or withdrawals. RPKI transition history is not available before it has been recorded.
- 11 Oct 00:00 UTC · First observed by pjhtech · 138.178.0.0/16
1 source observations
- routeviews2 · imported 11 Oct 01:01 UTC
- 11 Oct 00:00 UTC · First observed by pjhtech · 138.178.0.0/15
1 source observations
- routeviews2 · imported 11 Oct 01:01 UTC
- 10 Oct 20:00 UTC · No longer observed in selected snapshots · 138.178.0.0/15
1 source observations
- routeviews2 · imported 10 Oct 20:31 UTC
- 10 Oct 20:00 UTC · No longer observed in selected snapshots · 138.178.0.0/16
1 source observations
- routeviews2 · imported 10 Oct 20:31 UTC
Retained local prefix-count observations
Separate collector series. Missing rows are not zero. Peer-set changes are separate coverage, not a continuous trend.
| Source | Snapshot | Family | Prefixes | Peer coverage |
|---|---|---|---|---|
routeviews6 | 11 Oct 08:00 UTC | IPv6 | 2 | 2406:840:feed:2::1/IPv6 |
ris-rrc00 | 11 Oct 08:00 UTC | IPv4 | 227 | 2a00:5884::6/IPv6, 89.234.186.6/IPv4 |
ris-rrc00 | 11 Oct 08:00 UTC | IPv6 | 2 | 2a00:5884::6/IPv6, 89.234.186.6/IPv4 |
routeviews2 | 11 Oct 08:00 UTC | IPv4 | 227 | 140.192.8.16/IPv4 |
routeviews2 | 11 Oct 06:00 UTC | IPv4 | 227 | 140.192.8.16/IPv4 |
routeviews6 | 11 Oct 06:00 UTC | IPv6 | 2 | 2406:840:feed:2::1/IPv6 |
ris-rrc00 | 11 Oct 00:00 UTC | IPv4 | 227 | 2a00:5884::6/IPv6, 89.234.186.6/IPv4 |
ris-rrc00 | 11 Oct 00:00 UTC | IPv6 | 2 | 2a00:5884::6/IPv6, 89.234.186.6/IPv4 |