$ query “AS21859” --type=asn → 1 result(s)

AS21859 · ZEN-ECN

Zenlayer Inc

AS21859 belongs to Zenlayer Inc and is a major transit provider, based in the United States since 2013. The system announces a solid 703 232 IPv4 addresses, including a /16, and supports IPv6. Its primary geographic footprint is in the United States, with additional presence in Hong Kong SAR China and Singapore, and smaller footprints in 35 additional countries. Prefix announcements for this AS were recently updated.

  • Top 5% — Top 5% of all autonomous systems by reach and degree

Basic Information

Country
🇺🇸 United States
Category
Hosting
Network Role
Major Transit
Data Origin
Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
Registered
April 02, 2013
Last Changed
March 04, 2026
Last Seen
May 12, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
1 622 / 540
IPv6 Prefixes (raw / aggregated)
145 / 85
IPv4 Addresses
703 232
Largest IPv4 Prefix
/16 (65 536 addresses)
Largest IPv6 Prefix
/32
Geolocated Countries
🇺🇸 United States (478 720 IPs), 🇭🇰 Hong Kong SAR China (123 904 IPs), 🇸🇬 Singapore (69 376 IPs) and 35 more
Prefix Changed
May 12, 2026

Reputation

Reputation
Good — 376 flagged IPs out of 703 232 total (0.05%)
Tor Exit Nodes
2 known Tor exit nodes in this network
Open Proxies
1 known open proxies in this network

Connectivity Summary

Upstream Providers
68 upstreams providing transit
Peers
554 networks exchanging traffic without transit
Downstream Customers
216 downstreams buying transit
Unclassified
27 unclassified BGP neighbors
Degree
865 unique BGP neighbors
Reach
4 453 networks in customer cone

Upstream Providers (68)

Prefix Lists

IPv4 Prefixes (1 622 total)

  • 128.1.0.0/16 (65 536 addresses (/16 prefix))
  • 128.14.0.0/16 (65 536 addresses (/16 prefix))
  • 129.227.128.0/17 (32 768 addresses (/17 prefix))
  • 156.59.128.0/18 (16 384 addresses (/18 prefix))
  • 129.227.0.0/18 (16 384 addresses (/18 prefix))
  • 107.155.0.0/18 (16 384 addresses (/18 prefix))
  • 107.151.128.0/18 (16 384 addresses (/18 prefix))
  • 23.90.128.0/18 (16 384 addresses (/18 prefix))
  • 156.59.0.0/18 (16 384 addresses (/18 prefix))
  • 169.197.96.0/19 (8 192 addresses (/19 prefix))
  • 192.169.96.0/19 (8 192 addresses (/19 prefix))
  • 104.166.128.0/19 (8 192 addresses (/19 prefix))
  • 156.59.224.0/19 (8 192 addresses (/19 prefix))
  • 98.96.192.0/19 (8 192 addresses (/19 prefix))
  • 98.98.128.0/19 (8 192 addresses (/19 prefix))
  • 162.128.160.0/19 (8 192 addresses (/19 prefix))
  • 98.98.192.0/19 (8 192 addresses (/19 prefix))
  • 193.118.32.0/19 (8 192 addresses (/19 prefix))
  • 23.248.160.0/19 (8 192 addresses (/19 prefix))
  • 23.251.96.0/19 (8 192 addresses (/19 prefix))
  • 107.148.160.0/19 (8 192 addresses (/19 prefix))
  • 98.98.64.0/19 (8 192 addresses (/19 prefix))
  • 98.98.32.0/19 (8 192 addresses (/19 prefix))
  • 129.227.64.0/19 (8 192 addresses (/19 prefix))
  • 193.118.96.0/19 (8 192 addresses (/19 prefix))
  • 65.255.32.0/20 (4 096 addresses (/20 prefix))
  • 23.236.112.0/20 (4 096 addresses (/20 prefix))
  • 129.227.112.0/20 (4 096 addresses (/20 prefix))
  • 38.33.144.0/20 (4 096 addresses (/20 prefix))
  • 98.98.112.0/20 (4 096 addresses (/20 prefix))
  • 192.254.80.0/20 (4 096 addresses (/20 prefix))
  • 209.177.80.0/20 (4 096 addresses (/20 prefix))
  • 104.166.160.0/20 (4 096 addresses (/20 prefix))
  • 162.128.208.0/20 (4 096 addresses (/20 prefix))
  • 162.128.48.0/20 (4 096 addresses (/20 prefix))
  • 38.211.80.0/20 (4 096 addresses (/20 prefix))
  • 38.183.160.0/20 (4 096 addresses (/20 prefix))
  • 69.28.48.0/20 (4 096 addresses (/20 prefix))
  • 98.96.224.0/21 (2 048 addresses (/21 prefix))
  • 172.96.112.0/21 (2 048 addresses (/21 prefix))
  • 122.10.152.0/21 (2 048 addresses (/21 prefix))
  • 114.114.112.0/21 (2 048 addresses (/21 prefix))
  • 172.87.24.0/21 (2 048 addresses (/21 prefix))
  • 172.81.120.0/21 (2 048 addresses (/21 prefix))
  • 98.96.240.0/21 (2 048 addresses (/21 prefix))
  • 98.98.0.0/21 (2 048 addresses (/21 prefix))
  • 98.98.24.0/21 (2 048 addresses (/21 prefix))
  • 162.221.192.0/21 (2 048 addresses (/21 prefix))
  • 129.227.104.0/21 (2 048 addresses (/21 prefix))
  • 199.241.0.0/21 (2 048 addresses (/21 prefix))

IPv6 Prefixes (145 total)

  • 2607:a400::/32
  • 2a0b:21c0:8000::/33
  • 2604:980:8000::/34
  • 2a0b:21c0:4000::/34
  • 2604:980:2000::/35
  • 2604:980:4000::/35
  • 2a0b:21c0:2000::/35
  • 2a0b:21c1:1000::/36
  • 2a0b:21c0:1000::/36
  • 2604:980:1000::/36
  • 2a0b:21c1:3000::/36
  • 2604:980:7000::/36
  • 2604:980:d000::/36
  • 2a0b:21c1:5000::/36
  • 2602:ffe4::/37
  • 2602:ffe4:800::/38
  • 2602:ffe4:c48::/45
  • 2604:980:e00c::/46
  • 2602:ffe4:c50::/46
  • 2604:980:e004::/46
  • 2a0b:21c1:6008::/47
  • 2602:ffe4:c40::/47
  • 2604:980:e00a::/47
  • 2602:ffe4:c26::/47
  • 2604:980:e034::/47
  • 2604:980:e000::/47
  • 2602:ffe4:c02::/47
  • 2602:ffe4:c18::/47
  • 2602:ffe4:c0a::/47
  • 2602:ffe4:c20::/47
  • 2a0b:21c1:6010::/47
  • 2602:ffe4:c44::/47
  • 2602:ffe4:c64::/47
  • 2602:ffe4:c14::/47
  • 2a10:3c0:4::/47
  • 2602:ffe4:c56::/47
  • 2602:ffe4:c06::/47
  • 2602:ffe4:c9c::/47
  • 2602:ffe4:c7a::/47
  • 2602:ffe4:c6c::/47
  • 2602:ffe4:c6e::/48
  • 2604:980:e032::/48
  • 2404:3700::/48
  • 2602:ffe4:c70::/48
  • 2602:ffe4:c72::/48
  • 2602:ffe4:c79::/48
  • 2602:ffe4:c5d::/48
  • 2602:ffe4:c5b::/48
  • 2602:ffe4:c9e::/48
  • 2602:ffe4:ca0::/48