$ query “AS15576” --type=asn → 1 result(s)

AS15576 · NTS

NTS workspace AG

AS15576 is run by NTS workspace AG and is a mid-size transit provider, established in Switzerland in 2004. The system announces a respectable 47 616 IPv4 addresses, and supports IPv6. Most of its address space is geolocated to Switzerland.

  • Top 5% — Top 5% of all autonomous systems by reach and degree
  • #7 in Switzerland — Top 10 by reach within country

Basic Information

Country
🇨🇭 Switzerland
Category
Hosting
Network Role
Mid-size Transit
Data Origin
Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
Registered
February 24, 2004
Last Changed
March 04, 2026
Last Seen
June 22, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
44 / 39
IPv6 Prefixes (raw / aggregated)
13 / 12
IPv4 Addresses
47 616
Largest IPv4 Prefix
/19 (8 192 addresses)
Largest IPv6 Prefix
/29
Geolocated Countries
🇨🇭 Switzerland (92 160 IPs)
Prefix Changed
April 22, 2026

Reputation

Reputation
Pristine — 0 flagged IPs

Connectivity Summary

Upstream Providers
3 upstreams providing transit
Peers
598 networks exchanging traffic without transit
Downstream Customers
35 downstreams buying transit
Unclassified
6 unclassified BGP neighbors
Degree
642 unique BGP neighbors
Reach
162 networks in customer cone

Upstream Providers (3)

  • AS174 — COGENT (Tier-1 transit)
  • AS3356 — LEVEL3 (Tier-1 transit)
  • AS8220 — COLT

Prefix Lists

IPv4 Prefixes (44 total)

  • 212.103.64.0/19 (8 192 addresses (/19 prefix))
  • 217.146.160.0/20 (4 096 addresses (/20 prefix))
  • 217.11.208.0/20 (4 096 addresses (/20 prefix))
  • 217.68.224.0/20 (4 096 addresses (/20 prefix))
  • 188.92.224.0/21 (2 048 addresses (/21 prefix))
  • 85.118.216.0/21 (2 048 addresses (/21 prefix))
  • 87.237.168.0/21 (2 048 addresses (/21 prefix))
  • 217.197.128.0/21 (2 048 addresses (/21 prefix))
  • 94.126.248.0/21 (2 048 addresses (/21 prefix))
  • 77.95.120.0/21 (2 048 addresses (/21 prefix))
  • 185.79.200.0/22 (1 024 addresses (/22 prefix))
  • 185.98.152.0/22 (1 024 addresses (/22 prefix))
  • 185.218.240.0/22 (1 024 addresses (/22 prefix))
  • 185.254.76.0/22 (1 024 addresses (/22 prefix))
  • 193.138.212.0/22 (1 024 addresses (/22 prefix))
  • 185.75.152.0/22 (1 024 addresses (/22 prefix))
  • 185.63.148.0/22 (1 024 addresses (/22 prefix))
  • 88.214.4.0/22 (1 024 addresses (/22 prefix))
  • 185.187.120.0/23 (512 addresses (/23 prefix))
  • 185.253.192.0/23 (512 addresses (/23 prefix))
  • 94.176.192.0/23 (512 addresses (/23 prefix))
  • 203.56.114.0/23 (512 addresses (/23 prefix))
  • 195.189.252.0/23 (512 addresses (/23 prefix))
  • 193.17.76.0/24 (256 addresses (/24 prefix))
  • 193.104.116.0/24 (256 addresses (/24 prefix))
  • 193.200.157.0/24 (256 addresses (/24 prefix))
  • 193.222.138.0/24 (256 addresses (/24 prefix))
  • 194.11.160.0/24 (256 addresses (/24 prefix))
  • 194.153.94.0/24 (256 addresses (/24 prefix))
  • 194.176.116.0/24 (256 addresses (/24 prefix))
  • 195.137.172.0/24 (256 addresses (/24 prefix))
  • 193.47.190.0/24 (256 addresses (/24 prefix))
  • 195.216.227.0/24 (256 addresses (/24 prefix))
  • 193.47.103.0/24 (256 addresses (/24 prefix))
  • 193.43.183.0/24 (256 addresses (/24 prefix))
  • 193.43.27.0/24 (256 addresses (/24 prefix))
  • 193.8.77.0/24 (256 addresses (/24 prefix))
  • 91.199.198.0/24 (256 addresses (/24 prefix))
  • 91.198.79.0/24 (256 addresses (/24 prefix))

IPv6 Prefixes (13 total)

  • 2a06:5100::/29
  • 2a00:c38::/32
  • 2a01:a480::/32
  • 2a02:ce40::/32
  • 2a03:580::/32
  • 2a03:4ae0::/32
  • 2a03:5e20::/32
  • 2a14:3e44::/32
  • 2a0b:9e80::/36
  • 2001:67c:168::/48
  • 2001:67c:66c::/48
  • 2001:67c:18c4::/48