AS26959Cognizant Trizetto Software Group, INC.
United StatesRegistryARINAs of 10th November 2026, AS26959 (Cognizant Trizetto Software Group, INC.), a network registered in the United States with ARIN, originates 4 IPv4 prefixes covering 1k addresses. By IPv4 address space that makes it the 36,486th-largest of the 80,723 networks we see originating IPv4, and the 8,241st-largest of 18,750 in the United States. It is seen behind 4 upstream networks, most often AS209 (Lumen (ex. Qwest)) and AS3356 (Lumen (Level 3)). 50% of its announcements have 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 AS26959 is seen behind, one and two hops out, drawn from real AS paths.
Networks observed one and two hops upstream of AS26959 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
9
adjacent networks
- Upstreams
- 444%
- Peers
- 556%
- Downstreams
- 00%
Networks carrying this one's traffic toward the rest of the internet.
| Network | Country | Relationship | Paths | Vantage pts |
|---|---|---|---|---|
| AS209Lumen (ex. Qwest) | US | Peer | 150 | 75 |
| AS3356Lumen (Level 3) | US | Peer | 91 | 47 |
| AS6461Zayo Bandwidth | US | Peer | 61 | 32 |
| AS701Verizon Business | US | Peer | 2 | 1 |
Prefixes
The largest blocks AS26959 originates, widest first.
| Prefix | Addresses | Visibility |
|---|---|---|
| 8.10.149.0/24 | 256 | 76/76 |
| 8.44.139.0/24 | 256 | 76/76 |
| 12.36.9.0/24 | 256 | 76/76 |
| 205.169.123.0/24 | 256 | 76/76 |
Routing health
How AS26959'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
- Valid50.0%2
- Invalid0.0%0
- No ROA50.0%2
Propagation
- Globally propagated90% of full-feed peers or more100.0%4
- Partially propagated40% to 90%0.0%0
- Seen by few peersUnder 40%0.0%0
Prefix sizes
IPv4 — 4 prefixes
Recent changes
Announcements that started or stopped since 11th Oct 2026.
No announcement by AS26959 started or stopped in this period.
Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.