AS19551Incapsula Inc
United StatesRegistryARINTypeContentAs of 26th September 2026, AS19551 (Incapsula Inc), a content network registered in the United States with ARIN, originates 909 IPv4 prefixes covering 233k addresses and 726 IPv6 prefixes. By IPv4 address space that makes it the 1,181st-largest of the 79,516 networks we see originating IPv4, and the 325th-largest of 18,424 in the United States. It is seen behind 108 upstream networks, most often AS1299 (Arelion (fka. Telia Carrier)) and AS2914 (NTT America, Inc.), and in front of 154 downstream networks. Over 99% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. Over 99% of its routes reach at least 90% of full-feed peers, and 5 prefixes are also originated by another network.
At a glance
IPv4 prefixes
IPv6 prefixes
IPv4 addresses
IPv6 /64s
Upstream graph
The networks AS19551 is seen behind, one and two hops out, drawn from real AS paths.
Networks observed one and two hops upstream of AS19551 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
878
adjacent networks
- Upstreams
- 10812%
- Peers
- 61670%
- Downstreams
- 15418%
Networks carrying this one's traffic toward the rest of the internet. Listing the 40 seen on the most AS paths, of 108.
| Network | Country | Relationship | Paths | Vantage pts |
|---|---|---|---|---|
| AS1299Arelion (fka. Telia Carrier) |  SE | Peer | 77,932 | 145 |
| AS2914NTT America, Inc. | US | Peer | 39,645 | 106 |
| AS4637Telstra International Limited |  HK | Peer | 28,374 | 145 |
| AS3491PCCW Global (HK) Ltd. | HK | Peer | 14,825 | 101 |
| AS3257GTT Communications Inc. | US | Peer | 14,290 | 128 |
| AS6939Hurricane Electric LLC | US | Peer | 9,844 | 36 |
| AS12956Telxius (Telefonica Global) |  ES | Peer | 6,777 | 143 |
| AS14537Continent 8 LLC | US | Peer | 5,799 | 4 |
| AS18106Viewqwest Pte Ltd |  SG | Peer | 3,059 | 4 |
| AS9002RETN Limited |  GB | Peer | 2,953 | 139 |
Prefixes
All 1,635The largest blocks AS19551 originates, widest first.
| Prefix | Addresses | Visibility |
|---|---|---|
| 42.200.61.0/24 | 256 | 81/81 |
| 45.60.0.0/24 | 256 | 81/81 |
| 45.60.1.0/24 | 256 | 81/81 |
| 45.60.2.0/24 | 256 | 81/81 |
| 45.60.3.0/24 | 256 | 81/81 |
| 45.60.4.0/24 | 256 | 81/81 |
| 45.60.5.0/24 | 256 | 81/81 |
| 45.60.6.0/24 | 256 | 81/81 |
| 45.60.7.0/24 | 256 | 80/81 |
| 45.60.8.0/24 | 256 | 80/81 |
Routing health
How AS19551'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
- Valid99.2%1,622
- Invalid0.0%0
- No ROA0.8%13
Propagation
- Globally propagated90% of full-feed peers or more99.7%1,630
- Partially propagated40% to 90%0.2%3
- Seen by few peersUnder 40%0.1%2
Prefix sizes
IPv4 — 909 prefixes
IPv6 — 726 prefixes
- /4865.5k × /64100.0%726
Recent changes
Announcements that started or stopped since 28th Aug 2026.
- Announced45.223.189.0/2424th Sept 2026
- Withdrawn107.154.242.0/2422nd Sept 2026
- Withdrawn131.125.205.0/2422nd Sept 2026
- Withdrawn198.143.43.0/2422nd Sept 2026
- Withdrawn198.143.53.0/2422nd Sept 2026
- Withdrawn2a02:e980:259::/4822nd Sept 2026
- Withdrawn2a02:e980:25a::/4822nd Sept 2026
- Withdrawn2a02:e981:9::/4822nd Sept 2026
- Announced45.60.2.0/2422nd Sept 2026
- Announced107.154.73.0/2422nd Sept 2026
- Announced131.125.170.0/2422nd Sept 2026
- Announced131.125.171.0/2422nd Sept 2026
33 announced and 11 withdrawn in all; the most recent are shown.
Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.