asn.dev

Observed topology

AS19551 INCAPSULA - Incapsula Inc

Hosting ARIN Content

Upstreams 112 carry this network
Downstreams 150 this network carries
Adjacent (IPv4) 255
Adjacent (IPv6) 87
Upstream graph Who carries AS19551, and who carries them, drawn as a map up to the transit-free core. 76 exchanges Where AS19551 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 112

Networks observed carrying traffic for AS19551: the AS immediately before it in a routing path. Ranked by how many paths showed the relationship, which reflects how widely it is used, not how much traffic crosses it.

ASNetworkTypeFamiliesPaths seen
AS1299Arelion Sweden ABTransitIPv4 IPv619,761
AS6939Hurricane Electric LLCTransitIPv4 IPv610,686
AS4637Telstra GlobalUnclassifiedIPv4 IPv66,395
AS2914NTT America, Inc.TransitIPv4 IPv65,753
AS174Cogent Communications, LLCTransitIPv4 IPv64,038
AS14960Incapsula IncUnclassifiedIPv4 IPv61,922
AS3491PCCW Global (HK) Ltd.TransitIPv4 IPv61,895
AS34549meerfarbig GmbH & Co. KGHostingIPv4 IPv61,443
AS24482SG.GSHostingIPv4 IPv61,219
AS3257GTT Communications Inc.TransitIPv4 IPv61,218

All 112 upstreams →

Transit

Downstream networks

All 150

Networks for which AS19551 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS27715Locaweb Servicos de Internet S/AHostingIPv433,844
AS22612Namecheap, Inc.HostingIPv414,412
AS394417NJOITUnclassifiedIPv44,769
AS134729JOINT POWER TECHNOLOGY LIMITEDUnclassifiedIPv44,249
AS3762InstinetUnclassifiedIPv43,526
AS11857Money Services, Inc.UnclassifiedIPv42,434
AS147019jiiiUnclassifiedIPv41,952
AS11188LOS ANGELES COUNTY - INTERNAL SERVICESDIVISIONUnclassifiedIPv41,732
AS14495Nasdaq, Inc.UnclassifiedIPv41,286
AS10444ZB, National AssociationUnclassifiedIPv41,284

All 150 downstreams →

Adjacency

Adjacent networks

All 265

Every AS seen directly next to AS19551 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS1299Arelion Sweden ABTransitIPv4 IPv661,343
AS27715Locaweb Servicos de Internet S/AHostingIPv433,844
AS2914NTT America, Inc.TransitIPv4 IPv620,301
AS6939Hurricane Electric LLCTransitIPv4 IPv619,636
AS22612Namecheap, Inc.HostingIPv414,412
AS4637Telstra GlobalUnclassifiedIPv4 IPv613,032
AS174Cogent Communications, LLCTransitIPv4 IPv611,465
AS3257GTT Communications Inc.TransitIPv4 IPv68,680
AS3491PCCW Global (HK) Ltd.TransitIPv4 IPv66,353
AS394417NJOITUnclassifiedIPv44,769

All 265 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-13 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 74.40M route entries. These are observations from those vantage points, not a complete or authoritative view of the internet.

Inferred from path position, not from any declaration by either party. A network appearing here is carrying these routes; whether that is a paid transit arrangement, a backup, or something else is not something routing data can tell you. Adjacency is not the same as peering. Being next to each other in a path covers paid transit, settlement-free peering and customer connections alike, and routing data cannot distinguish them. Treat this as "these networks exchange routes", nothing more specific.

Cross-check against RIPEstat or BGP.tools, which observe from a different and larger set of vantage points.