subnet.im

AS15576NTS workspace AG

SwitzerlandRegistryRIPE NCCTypeCarrier

As of 26th September 2026, AS15576 (NTS workspace AG), a transit carrier registered in Switzerland with RIPE NCC, originates 43 IPv4 prefixes covering 47.6k addresses and 14 IPv6 prefixes. By IPv4 address space that makes it the 4,563rd-largest of the 79,480 networks we see originating IPv4, and the 39th-largest of 739 in Switzerland. It is seen behind 30 upstream networks, most often AS51907 (Kanton Zug) and AS34288 (Kantonsschule Zug), and in front of 172 downstream networks. Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 95% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

43

IPv6 prefixes

14

IPv4 addresses

47.6k

IPv6 /64s

99.1B

Upstream graph

The networks AS15576 is seen behind, one and two hops out, drawn from real AS paths.

AS15576Toward the internet core
Upstream graph for AS15576: 11 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS15576NTS workspace AGThis networkAS174Cogent Communicat…AS3356Lumen (Level 3)AS8220COLTAS34288Kantonsschule ZugAS51907Kanton ZugAS1299Arelion (fka. Tel…AS151326DCConnect Communi…AS2914NTT America, Inc.AS3549Lumen (fka. Globa…AS9002RETN LimitedAS39040NTS workspace AG

Networks observed one and two hops upstream of AS15576 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
303%
Peers
68177%
Downstreams
17219%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS15576
NetworkCountryRelationshipPathsVantage pts
AS51907Kanton ZugCHPeer464,7612
AS34288Kantonsschule ZugCHPeer14,9282
AS8220COLTGBPeer5,06475
AS3356Lumen (Level 3)USPeer2,07987
AS174Cogent Communications, LLCUSPeer1,258101
AS6939Hurricane Electric LLCUSPeer21911
AS39122Blacknight Internet Solutions LimitedIEPeer2102
AS38880Micron21 Datacentre Pty LtdAUPeer2042
AS23673Cogetel Online, Cambodia, ISPKHPeer1972
AS58511Swoop (Anycast Global Backbone)AUPeer1302

Prefixes

All 57

The largest blocks AS15576 originates, widest first.

Largest prefixes originated by AS15576
PrefixAddressesVisibility
212.103.64.0/198.2k80/81
217.11.208.0/204.1k80/81
217.68.224.0/204.1k80/81
217.146.160.0/204.1k80/81
77.95.120.0/212k80/81
85.118.216.0/212k80/81
94.126.248.0/212k80/81
188.92.224.0/212k80/81
217.197.128.0/212k80/81
87.237.168.0/221k80/81

Routing health

How AS15576'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

  • Valid100.0%57
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more94.7%54
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%5.3%3

Prefix sizes

IPv4 — 43 prefixes

IPv6 — 14 prefixes

  • /2934.4B × /6414.3%2
  • /324.3B × /6450.0%7
  • /36268M × /647.1%1
  • /4865.5k × /6428.6%4

Recent changes

Announcements that started or stopped since 27th Aug 2026.

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.