Autonomous System
AS19551 · Incapsula Inc
Overview
AS19551 is announced on the Internet: RIPE RIS route collectors currently see 913 IPv4 prefixes and 726 IPv6 prefixes originated by this network. Together, its IPv4 prefixes cover 233,728 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 179 upstream neighbours (transit providers or peers) and 153 downstream neighbours (customers or networks it carries). Its most visible upstreams are Arelion Sweden AB (AS1299), NTT America, Inc. (AS2914), and Telstra Global (AS4637). AS19551 was assigned by ARIN, and its registration country is United States.
Source: RIPEstat (RIPE NCC), RIS route collectors. Read on October 16, 2026 at 7:02 PM UTC. This page is refreshed at most every 12 hours.
Go further
The trace goes to 42.200.61.1, the first address of 42.200.61.0/24. An address picked inside a prefix may not answer (nothing listens there, or the network filters probes): the trace then shows the path up to the last network that replies.
Announced prefixes
IPv4 prefixes (913 prefixes)
| Prefix | Addresses |
|---|---|
| 42.200.61.0/24 | 256 |
| 45.60.0.0/24 | 256 |
| 45.60.1.0/24 | 256 |
| 45.60.2.0/24 | 256 |
| 45.60.3.0/24 | 256 |
| 45.60.4.0/24 | 256 |
| 45.60.5.0/24 | 256 |
| 45.60.6.0/24 | 256 |
| 45.60.7.0/24 | 256 |
| 45.60.8.0/24 | 256 |
| 45.60.9.0/24 | 256 |
| 45.60.10.0/24 | 256 |
| 45.60.11.0/24 | 256 |
| 45.60.12.0/24 | 256 |
| 45.60.13.0/24 | 256 |
| 45.60.14.0/24 | 256 |
| 45.60.15.0/24 | 256 |
| 45.60.16.0/24 | 256 |
| 45.60.17.0/24 | 256 |
| 45.60.18.0/24 | 256 |
| 45.60.19.0/24 | 256 |
| 45.60.20.0/24 | 256 |
| 45.60.21.0/24 | 256 |
| 45.60.22.0/24 | 256 |
| 45.60.23.0/24 | 256 |
| 45.60.24.0/24 | 256 |
| 45.60.25.0/24 | 256 |
| 45.60.26.0/24 | 256 |
| 45.60.27.0/24 | 256 |
| 45.60.28.0/24 | 256 |
| 45.60.29.0/24 | 256 |
| 45.60.30.0/24 | 256 |
| 45.60.31.0/24 | 256 |
| 45.60.32.0/24 | 256 |
| 45.60.33.0/24 | 256 |
| 45.60.34.0/24 | 256 |
| 45.60.35.0/24 | 256 |
| 45.60.36.0/24 | 256 |
| 45.60.37.0/24 | 256 |
| 45.60.38.0/24 | 256 |
| 45.60.39.0/24 | 256 |
| 45.60.40.0/24 | 256 |
| 45.60.42.0/24 | 256 |
| 45.60.44.0/24 | 256 |
| 45.60.45.0/24 | 256 |
| 45.60.46.0/24 | 256 |
| 45.60.47.0/24 | 256 |
| 45.60.48.0/24 | 256 |
| 45.60.49.0/24 | 256 |
| 45.60.50.0/24 | 256 |
| 45.60.51.0/24 | 256 |
| 45.60.52.0/24 | 256 |
| 45.60.53.0/24 | 256 |
| 45.60.54.0/24 | 256 |
| 45.60.55.0/24 | 256 |
| 45.60.56.0/24 | 256 |
| 45.60.57.0/24 | 256 |
| 45.60.58.0/24 | 256 |
| 45.60.60.0/24 | 256 |
| 45.60.61.0/24 | 256 |
| 45.60.62.0/24 | 256 |
| 45.60.63.0/24 | 256 |
| 45.60.64.0/24 | 256 |
| 45.60.65.0/24 | 256 |
| 45.60.66.0/24 | 256 |
| 45.60.67.0/24 | 256 |
| 45.60.68.0/24 | 256 |
| 45.60.69.0/24 | 256 |
| 45.60.70.0/24 | 256 |
| 45.60.71.0/24 | 256 |
| 45.60.72.0/24 | 256 |
| 45.60.73.0/24 | 256 |
| 45.60.74.0/24 | 256 |
| 45.60.75.0/24 | 256 |
| 45.60.76.0/24 | 256 |
| 45.60.77.0/24 | 256 |
| 45.60.78.0/24 | 256 |
| 45.60.79.0/24 | 256 |
| 45.60.80.0/24 | 256 |
| 45.60.81.0/24 | 256 |
| 45.60.82.0/24 | 256 |
| 45.60.83.0/24 | 256 |
| 45.60.84.0/24 | 256 |
| 45.60.85.0/24 | 256 |
| 45.60.86.0/24 | 256 |
| 45.60.87.0/24 | 256 |
| 45.60.88.0/24 | 256 |
| 45.60.89.0/24 | 256 |
| 45.60.90.0/24 | 256 |
| 45.60.91.0/24 | 256 |
| 45.60.92.0/24 | 256 |
| 45.60.93.0/24 | 256 |
| 45.60.94.0/24 | 256 |
| 45.60.95.0/24 | 256 |
| 45.60.96.0/24 | 256 |
| 45.60.97.0/24 | 256 |
| 45.60.98.0/24 | 256 |
| 45.60.99.0/24 | 256 |
| 45.60.100.0/24 | 256 |
| 45.60.101.0/24 | 256 |
Showing the first 100 of 913, in address order. Complete list on RIPEstat
IPv6 prefixes (726 prefixes)
| Prefix |
|---|
| 2a02:e980::/48 |
| 2a02:e980:1::/48 |
| 2a02:e980:2::/48 |
| 2a02:e980:3::/48 |
| 2a02:e980:4::/48 |
| 2a02:e980:5::/48 |
| 2a02:e980:6::/48 |
| 2a02:e980:7::/48 |
| 2a02:e980:8::/48 |
| 2a02:e980:9::/48 |
| 2a02:e980:a::/48 |
| 2a02:e980:b::/48 |
| 2a02:e980:c::/48 |
| 2a02:e980:d::/48 |
| 2a02:e980:e::/48 |
| 2a02:e980:f::/48 |
| 2a02:e980:10::/48 |
| 2a02:e980:11::/48 |
| 2a02:e980:12::/48 |
| 2a02:e980:13::/48 |
| 2a02:e980:14::/48 |
| 2a02:e980:15::/48 |
| 2a02:e980:16::/48 |
| 2a02:e980:17::/48 |
| 2a02:e980:18::/48 |
| 2a02:e980:19::/48 |
| 2a02:e980:1b::/48 |
| 2a02:e980:1c::/48 |
| 2a02:e980:1d::/48 |
| 2a02:e980:1e::/48 |
| 2a02:e980:1f::/48 |
| 2a02:e980:20::/48 |
| 2a02:e980:21::/48 |
| 2a02:e980:22::/48 |
| 2a02:e980:23::/48 |
| 2a02:e980:25::/48 |
| 2a02:e980:26::/48 |
| 2a02:e980:27::/48 |
| 2a02:e980:28::/48 |
| 2a02:e980:29::/48 |
| 2a02:e980:2a::/48 |
| 2a02:e980:2b::/48 |
| 2a02:e980:2c::/48 |
| 2a02:e980:2d::/48 |
| 2a02:e980:2e::/48 |
| 2a02:e980:2f::/48 |
| 2a02:e980:30::/48 |
| 2a02:e980:31::/48 |
| 2a02:e980:33::/48 |
| 2a02:e980:34::/48 |
| 2a02:e980:35::/48 |
| 2a02:e980:36::/48 |
| 2a02:e980:37::/48 |
| 2a02:e980:38::/48 |
| 2a02:e980:39::/48 |
| 2a02:e980:3a::/48 |
| 2a02:e980:3b::/48 |
| 2a02:e980:3c::/48 |
| 2a02:e980:3d::/48 |
| 2a02:e980:3e::/48 |
| 2a02:e980:3f::/48 |
| 2a02:e980:40::/48 |
| 2a02:e980:41::/48 |
| 2a02:e980:42::/48 |
| 2a02:e980:43::/48 |
| 2a02:e980:44::/48 |
| 2a02:e980:45::/48 |
| 2a02:e980:46::/48 |
| 2a02:e980:47::/48 |
| 2a02:e980:48::/48 |
| 2a02:e980:49::/48 |
| 2a02:e980:4d::/48 |
| 2a02:e980:4f::/48 |
| 2a02:e980:50::/48 |
| 2a02:e980:51::/48 |
| 2a02:e980:52::/48 |
| 2a02:e980:53::/48 |
| 2a02:e980:54::/48 |
| 2a02:e980:55::/48 |
| 2a02:e980:56::/48 |
| 2a02:e980:57::/48 |
| 2a02:e980:58::/48 |
| 2a02:e980:59::/48 |
| 2a02:e980:5a::/48 |
| 2a02:e980:5b::/48 |
| 2a02:e980:5c::/48 |
| 2a02:e980:5d::/48 |
| 2a02:e980:5e::/48 |
| 2a02:e980:5f::/48 |
| 2a02:e980:60::/48 |
| 2a02:e980:61::/48 |
| 2a02:e980:62::/48 |
| 2a02:e980:63::/48 |
| 2a02:e980:64::/48 |
| 2a02:e980:65::/48 |
| 2a02:e980:66::/48 |
| 2a02:e980:67::/48 |
| 2a02:e980:68::/48 |
| 2a02:e980:69::/48 |
| 2a02:e980:6a::/48 |
Showing the first 100 of 726, in address order. Complete list on RIPEstat
Neighbours
Upstreams (transit or peers) (179)
| AS | Network | Visibility |
|---|---|---|
| AS1299 | Arelion Sweden AB | 19,436 |
| AS2914 | NTT America, Inc. | 7,063 |
| AS4637 | Telstra Global | 4,922 |
| AS174 | Cogent Communications, LLC | 3,199 |
| AS6939 | Hurricane Electric LLC | 2,952 |
| AS3257 | GTT Communications Inc. | 2,487 |
| AS3491 | PCCW Global (HK) Ltd. | 2,316 |
| AS12956 | TELEFONICA GLOBAL SOLUTIONS SL | 1,807 |
| AS200612 | GulfBridgeInternational Gulf Bridge International Inc. | 1,182 |
| AS5511 | Opentransit Orange S.A. | 786 |
| AS30844 | Liquid Telecommunications Ltd | 764 |
| AS9498 | BHARTI Airtel Ltd. | 740 |
| AS9930 | TIME dotCom Berhad No. 14, Jalan Majistret U1/26 Hicom Glenmarie Industrial Park 40150 Shah Alam Selangor, Malaysia | 711 |
| AS4826 | Vocus Connect International Backbone | 610 |
| AS9002 | RETN Limited | 594 |
| AS37662 | West Indian Ocean Cable Company | 574 |
| AS1680 | - | 562 |
| AS14960 | - | 555 |
| AS3320 | Deutsche Telekom AG | 500 |
| AS45903 | CMC Telecom Infrastructure Company | 379 |
| AS6762 | TELECOM ITALIA SPARKLE S.p.A. | 343 |
| AS7473 | Singapore Telecommunications Ltd | 329 |
| AS7713 | PT Telekomunikasi Indonesia | 313 |
| AS4800 | PT Aplikanusa Lintasarta | 278 |
| AS55410 | Vodafone Idea Ltd | 277 |
| AS4648 | - | 271 |
| AS9299 | Philippine Long Distance Telephone Company | 271 |
| AS135069 | - | 266 |
| AS8220 | COLT Technology Services Group Limited | 249 |
| AS32098 | Transtelco Inc | 243 |
The 30 most visible of 179.
Downstreams (customers) (153)
| AS | Network | Visibility |
|---|---|---|
| AS3762 | Instinet | 1,594 |
| AS9735 | Hong Kong Domain Name Registration Co. Ltd | 1,032 |
| AS9435 | Suncorp Corporate Services Pty Ltd | 1,023 |
| AS22612 | Namecheap, Inc. | 860 |
| AS11857 | Money Services, Inc. | 839 |
| AS28517 | TV Azteca, S.A.B. de C.V. | 821 |
| AS38166 | Standard Chartered Bank (Hong Kong) Limited.Banking and | 580 |
| AS57666 | Kupat-Holim-Clalit | 563 |
| AS147060 | HCS LIMITED | 563 |
| AS39584 | Legal & General Investment Management Holdings Ltd | 560 |
| AS134729 | - | 545 |
| AS212012 | - | 531 |
| AS51439 | - | 530 |
| AS55547 | - | 530 |
| AS394565 | - | 524 |
| AS18674 | - | 522 |
| AS59116 | - | 519 |
| AS137831 | SEA IX | 519 |
| AS131162 | - | 518 |
| AS132046 | - | 504 |
| AS20187 | - | 501 |
| AS48463 | - | 500 |
| AS55925 | - | 494 |
| AS29733 | - | 490 |
| AS51318 | - | 482 |
| AS213815 | - | 470 |
| AS57144 | - | 456 |
| AS62571 | - | 434 |
| AS201071 | - | 422 |
| AS399405 | - | 403 |
The 30 most visible of 153.
177 more neighbours appear on both sides of this network depending on the path, so they are counted in neither list.
Visibility is RIPEstat's count of how often the route collectors observed the link. It compares neighbours with each other; it is not a traffic volume.
How to read this page
An Autonomous System (AS) is a network run under one routing policy: an internet provider, a cloud, a content network, a university. Each one has a number, its ASN, assigned by a regional registry (ARIN, RIPE NCC, APNIC, LACNIC, AFRINIC), and uses BGP, the protocol networks use to tell each other where addresses are, to announce the blocks of addresses it delivers to.
A prefix such as 203.0.113.0/24 is a block of addresses: the number after the slash says how many bits are fixed, so a /24 holds 256 IPv4 addresses and a /16 holds 65,536. Networks often announce a large block and smaller pieces of it at the same time, which is why the address total counts each address once.
Neighbours come from the paths themselves. A network that appears just before this one in a path, on the collector's side, is an upstream: a transit provider or a peer. One that appears just after it is a downstream, usually a customer. Peering at an internet exchange also shows up as an upstream, so the upstream list is not a list of paid transit.
The data comes from RIPEstat, run by the RIPE NCC, which gathers the routing tables of hundreds of networks through its RIS route collectors. This page reads it when it is visited and keeps it for 12 hours at most; the BGP viewer reads it live.