AS11739Digital Fortress, Inc.
United StatesRegistryARINAs of 23rd October 2026, AS11739 (Digital Fortress, Inc.), a network registered in the United States with ARIN, originates 3 IPv4 prefixes covering 768 addresses. By IPv4 address space that makes it the 44,967th-largest of the 79,659 networks we see originating IPv4, and the 9,401st-largest of 18,482 in the United States. It is seen behind 6 upstream networks, most often AS20055 (Ziply Fiber) and AS174 (Cogent Communications, LLC), and in front of 1 downstream network. Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 100% of its routes reach at least 90% of full-feed peers.
At a glance
IPv4 prefixes
IPv6 prefixes
IPv4 addresses
IPv6 /64s
Upstream graph
The networks AS11739 is seen behind, one and two hops out, drawn from real AS paths.
Networks observed one and two hops upstream of AS11739 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.
Neighbouring networks
14
adjacent networks
- Upstreams
- 643%
- Peers
- 750%
- Downstreams
- 17%
Networks carrying this one's traffic toward the rest of the internet.
| Network | Country | Relationship | Paths | Vantage pts |
|---|---|---|---|---|
| AS20055Ziply Fiber | US | Peer | 408 | 40 |
| AS174Cogent Communications, LLC | US | Peer | 116 | 36 |
| AS6461Zayo Bandwidth | US | Peer | 74 | 74 |
| AS21508Comcast Cable Communications, LLC | US | Peer | 73 | 73 |
| AS701Verizon Business | US | Peer | 4 | 4 |
| AS33491Comcast Cable Communications, LLC | US | Peer | 3 | 3 |
Prefixes
The largest blocks AS11739 originates, widest first.
| Prefix | Addresses | Visibility |
|---|---|---|
| 74.209.162.0/24 | 256 | 76/77 |
| 209.20.152.0/24 | 256 | 77/77 |
| 209.20.153.0/24 | 256 | 77/77 |
Routing health
How AS11739's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.
RPKI origin validation
- Valid100.0%3
- Invalid0.0%0
- No ROA0.0%0
Propagation
- Globally propagated90% of full-feed peers or more100.0%3
- Partially propagated40% to 90%0.0%0
- Seen by few peersUnder 40%0.0%0
Prefix sizes
IPv4 — 3 prefixes
Recent changes
Announcements that started or stopped since 23rd Sept 2026.
No announcement by AS11739 started or stopped in this period.
Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.