AS19551Incapsula Inc
United StatesRegistryARINTypeContentAs of 11th November 2026, AS19551 (Incapsula Inc), a content network registered in the United States with ARIN, originates 927 IPv4 prefixes covering 237k addresses and 725 IPv6 prefixes. By IPv4 address space that makes it the 1,190th-largest of the 80,743 networks we see originating IPv4, and the 328th-largest of 18,754 in the United States. It is seen behind 111 upstream networks, most often AS1299 (Arelion (fka. Telia Carrier)) and AS2914 (NTT America, Inc.), and in front of 158 downstream networks. Over 99% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 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
883
adjacent networks
- Upstreams
- 11113%
- Peers
- 61470%
- Downstreams
- 15818%
Networks carrying this one's traffic toward the rest of the internet. Listing the 40 seen on the most AS paths, of 111.
| Network | Country | Relationship | Paths | Vantage pts |
|---|---|---|---|---|
| AS1299Arelion (fka. Telia Carrier) |  SE | Peer | 67,030 | 137 |
| AS2914NTT America, Inc. | US | Peer | 36,682 | 124 |
| AS4637Telstra International Limited |  HK | Peer | 27,868 | 139 |
| AS3491PCCW Global (HK) Ltd. | HK | Peer | 13,022 | 106 |
| AS3257GTT Communications Inc. | US | Peer | 12,468 | 111 |
| AS6939Hurricane Electric LLC | US | Peer | 9,317 | 28 |
| AS174Cogent Communications, LLC | US | Peer | 7,949 | 74 |
| AS12956Telxius (Telefonica Global) |  ES | Peer | 6,577 | 136 |
| AS14537Continent 8 LLC | US | Peer | 5,417 | 4 |
| AS18106Viewqwest Pte Ltd |  SG | Peer | 3,060 | 4 |
Prefixes
All 1,652The largest blocks AS19551 originates, widest first.
| Prefix | Addresses | Visibility |
|---|---|---|
| 42.200.61.0/24 | 256 | 76/76 |
| 45.60.0.0/24 | 256 | 76/76 |
| 45.60.1.0/24 | 256 | 76/76 |
| 45.60.2.0/24 | 256 | 76/76 |
| 45.60.3.0/24 | 256 | 76/76 |
| 45.60.4.0/24 | 256 | 76/76 |
| 45.60.5.0/24 | 256 | 76/76 |
| 45.60.6.0/24 | 256 | 76/76 |
| 45.60.7.0/24 | 256 | 75/76 |
| 45.60.8.0/24 | 256 | 75/76 |
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%1,639
- Invalid0.0%0
- No ROA0.8%13
Propagation
- Globally propagated90% of full-feed peers or more98.7%1,630
- Partially propagated40% to 90%<0.1%1
- Seen by few peersUnder 40%1.3%21
Prefix sizes
IPv4 — 927 prefixes
IPv6 — 725 prefixes
- /4865.5k × /64100.0%725
Recent changes
Announcements that started or stopped since 12th Oct 2026.
- Announced2a02:e982:23::/483rd Nov 2026
- Announced45.223.248.0/243rd Nov 2026
- Announced2a02:e981:10::/482nd Nov 2026
- Announced2a02:e981:16::/482nd Nov 2026
- Withdrawn2a02:e981:10::/481st Nov 2026
- Withdrawn2a02:e981:16::/481st Nov 2026
- Withdrawn131.125.196.0/2429th Oct 2026
- Withdrawn131.125.198.0/2429th Oct 2026
- Withdrawn2a02:e981:88::/4829th Oct 2026
- Withdrawn2a02:e981:89::/4829th Oct 2026
- Withdrawn2a02:e981:c::/4829th Oct 2026
- Announced107.154.241.0/2429th Oct 2026
47 announced and 35 withdrawn in all; the most recent are shown.
Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.