Autonomous System
AS12387 · TON Total optical Networks AG
Overview
AS12387 is announced on the Internet: RIPE RIS route collectors currently see 4 IPv4 prefixes and 1 IPv6 prefix originated by this network. Together, its IPv4 prefixes cover 9,216 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 46 upstream neighbours (transit providers or peers) and 26 downstream neighbours (customers or networks it carries). Its most visible upstreams are Hurricane Electric LLC (AS6939), Core-Backbone GmbH (AS33891), and IX Reach Ltd (AS4455). AS12387 was assigned by RIPE NCC, and its registration country is Switzerland.
Source: RIPEstat (RIPE NCC), RIS route collectors. Read on October 16, 2026 at 10:58 PM UTC. This page is refreshed at most every 12 hours.
Go further
The trace goes to 77.237.192.1, the first address of 77.237.192.0/19. 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 (4 prefixes)
| Prefix | Addresses |
|---|---|
| 77.237.192.0/19 | 8,192 |
| 77.237.206.0/23 | 512 |
| 77.237.208.0/23 | 512 |
| 195.4.176.0/22 | 1,024 |
IPv6 prefixes (1 prefix)
| Prefix |
|---|
| 2a00:c10::/32 |
Neighbours
Upstreams (transit or peers) (46)
| AS | Network | Visibility |
|---|---|---|
| AS6939 | Hurricane Electric LLC | 1,376 |
| AS33891 | Core-Backbone GmbH | 1,141 |
| AS4455 | IX Reach Ltd | 1,091 |
| AS9002 | RETN Limited | 782 |
| AS23764 | CTGNet | 265 |
| AS6730 | Sunrise GmbH | 136 |
| AS34549 | meerfarbig GmbH & Co. KG | 73 |
| AS34019 | Hivane Association | 48 |
| AS34927 | iFog GmbH | 47 |
| AS4230 | CLARO S.A. | 45 |
| AS20485 | Joint Stock Company TransTeleCom | 44 |
| AS43531 | BSO Network Solutions SAS | 43 |
| AS14840 | BR.Digital Telecom | 42 |
| AS31216 | BSO Network Solutions SAS | 40 |
| AS24961 | WIIT AG | 34 |
| AS5405 | - | 28 |
| AS39351 | 31173 Services AB | 25 |
| AS20764 | CJSC RASCOM | 24 |
| AS47147 | Anexia Cloud Solutions GmbH | 22 |
| AS29632 | Netassist International EOOD | 21 |
| AS55850 | Mercury NZ Limited | 20 |
| AS212024 | - | 20 |
| AS35625 | Eurofiber France SAS | 19 |
| AS29075 | IELO-LIAZO SERVICES SAS | 18 |
| AS35280 | F5 Networks SARL | 18 |
| AS8218 | Zayo Infrastructure France SA | 17 |
| AS13030 | Init7 (Switzerland) Ltd. | 16 |
| AS37100 | SEACOM Limited | 16 |
| AS1836 | green.ch AG | 15 |
| AS6204 | INTERKVM HOST SRL | 15 |
The 30 most visible of 46.
Downstreams (customers) (26)
| AS | Network | Visibility |
|---|---|---|
| AS205737 | naveum Naveum AG | 418 |
| AS48576 | risch Dr. Risch AG | 397 |
| AS205183 | neuebank Neue Bank AG | 380 |
| AS210736 | Hamilton Hamilton Services AG | 364 |
| AS25435 | META10 AG | 336 |
| AS206261 | DynaNet GmbH | 318 |
| AS59748 | kpms Kaiser Beteiligungen Anstalt | 316 |
| AS212629 | sgsw Sankt Galler Stadtwerke | 297 |
| AS35535 | Verwaltungs- und Privat Bank AG | 284 |
| AS205357 | winVS winVS software AG | 284 |
| AS50598 | - | 272 |
| AS197964 | - | 239 |
| AS20914 | - | 227 |
| AS39430 | - | 225 |
| AS49652 | - | 221 |
| AS207335 | - | 208 |
| AS25581 | - | 176 |
| AS42128 | - | 162 |
| AS21113 | - | 157 |
| AS61363 | - | 156 |
| AS202405 | - | 151 |
| AS56653 | - | 143 |
| AS48491 | - | 136 |
| AS35223 | - | 135 |
| AS57210 | - | 112 |
| AS208065 | - | 64 |
97 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.