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

AS21859 · ZEN-ECN

Zenlayer Inc

AS21859 is owned by Zenlayer Inc and is a major transit provider, registered in the United States since 2013. The system announces a solid 709 120 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 36 additional countries. This AS's prefix announcements have been recently modified.

  • 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
June 22, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
1 655 / 559
IPv6 Prefixes (raw / aggregated)
154 / 88
IPv4 Addresses
709 120
Largest IPv4 Prefix
/16 (65 536 addresses)
Largest IPv6 Prefix
/29
Geolocated Countries
🇺🇸 United States (479 488 IPs), 🇭🇰 Hong Kong SAR China (124 416 IPs), 🇸🇬 Singapore (72 192 IPs) and 36 more
Prefix Changed
June 23, 2026

Reputation

Reputation
Good — 323 flagged IPs out of 709 120 total (0.05%)
Open Proxies
2 known open proxies in this network

Connectivity Summary

Upstream Providers
62 upstreams providing transit
Peers
553 networks exchanging traffic without transit
Downstream Customers
221 downstreams buying transit
Unclassified
40 unclassified BGP neighbors
Degree
876 unique BGP neighbors
Reach
11 776 networks in customer cone

Upstream Providers (62)

Prefix Lists

IPv4 Prefixes (1 655 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))
  • 23.90.128.0/18 (16 384 addresses (/18 prefix))
  • 156.59.0.0/18 (16 384 addresses (/18 prefix))
  • 107.155.0.0/18 (16 384 addresses (/18 prefix))
  • 129.227.0.0/18 (16 384 addresses (/18 prefix))
  • 107.151.128.0/18 (16 384 addresses (/18 prefix))
  • 98.98.128.0/19 (8 192 addresses (/19 prefix))
  • 169.197.96.0/19 (8 192 addresses (/19 prefix))
  • 104.166.128.0/19 (8 192 addresses (/19 prefix))
  • 192.169.96.0/19 (8 192 addresses (/19 prefix))
  • 98.98.64.0/19 (8 192 addresses (/19 prefix))
  • 129.227.64.0/19 (8 192 addresses (/19 prefix))
  • 98.98.32.0/19 (8 192 addresses (/19 prefix))
  • 107.148.160.0/19 (8 192 addresses (/19 prefix))
  • 98.96.192.0/19 (8 192 addresses (/19 prefix))
  • 156.59.224.0/19 (8 192 addresses (/19 prefix))
  • 162.128.160.0/19 (8 192 addresses (/19 prefix))
  • 193.118.96.0/19 (8 192 addresses (/19 prefix))
  • 193.118.32.0/19 (8 192 addresses (/19 prefix))
  • 98.98.192.0/19 (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))
  • 38.33.144.0/20 (4 096 addresses (/20 prefix))
  • 38.183.160.0/20 (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))
  • 162.128.208.0/20 (4 096 addresses (/20 prefix))
  • 65.255.32.0/20 (4 096 addresses (/20 prefix))
  • 69.28.48.0/20 (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))
  • 162.128.48.0/20 (4 096 addresses (/20 prefix))
  • 98.98.112.0/20 (4 096 addresses (/20 prefix))
  • 38.211.80.0/20 (4 096 addresses (/20 prefix))
  • 192.254.80.0/20 (4 096 addresses (/20 prefix))
  • 172.96.112.0/21 (2 048 addresses (/21 prefix))
  • 104.218.160.0/21 (2 048 addresses (/21 prefix))
  • 156.59.64.0/21 (2 048 addresses (/21 prefix))
  • 98.98.248.0/21 (2 048 addresses (/21 prefix))
  • 162.128.32.0/21 (2 048 addresses (/21 prefix))
  • 162.221.192.0/21 (2 048 addresses (/21 prefix))
  • 199.241.0.0/21 (2 048 addresses (/21 prefix))
  • 199.245.56.0/21 (2 048 addresses (/21 prefix))
  • 172.87.24.0/21 (2 048 addresses (/21 prefix))
  • 156.59.80.0/21 (2 048 addresses (/21 prefix))
  • 114.114.112.0/21 (2 048 addresses (/21 prefix))
  • 162.128.240.0/21 (2 048 addresses (/21 prefix))

IPv6 Prefixes (154 total)

  • 2a05:2ac0::/29
  • 2a0c:6a80::/29
  • 2607:a400::/32
  • 2a0b:21c0:8000::/33
  • 2a0b:21c0:4000::/34
  • 2604:980:8000::/34
  • 2a0b:21c0:2000::/35
  • 2604:980:2000::/35
  • 2604:980:4000::/35
  • 2604:980:1000::/36
  • 2a0b:21c1:3000::/36
  • 2a0b:21c1:1000::/36
  • 2a0b:21c0:1000::/36
  • 2a0b:21c1:5000::/36
  • 2604:980:7000::/36
  • 2604:980:d000::/36
  • 2602:ffe4::/37
  • 2602:ffe4:800::/38
  • 2604:980:e008::/45
  • 2602:ffe4:c48::/45
  • 2604:980:e004::/46
  • 2403:8300:e08::/46
  • 2602:ffe4:c9c::/46
  • 2602:ffe4:c50::/46
  • 2604:980:e034::/47
  • 2602:ffe4:c64::/47
  • 2a10:3c0:4::/47
  • 2602:ffe4:c26::/47
  • 2a0b:21c1:6010::/47
  • 2a0b:21c1:6008::/47
  • 2403:8300:e04::/47
  • 2602:ffe4:c02::/47
  • 2602:ffe4:c06::/47
  • 2602:ffe4:c40::/47
  • 2602:ffe4:c0a::/47
  • 2602:ffe4:c44::/47
  • 2604:980:e000::/47
  • 2602:ffe4:c14::/47
  • 2602:ffe4:c20::/47
  • 2602:ffe4:c56::/47
  • 2602:ffe4:c18::/47
  • 2602:ffe4:c7a::/47
  • 2602:ffe4:c6c::/47
  • 2602:ffe4:c16::/48
  • 2604:980:e03e::/48
  • 2602:ffe4:c5d::/48
  • 2602:ffe4:c6e::/48
  • 2602:ffe4:c70::/48
  • 2602:ffe4:c72::/48
  • 2602:ffe4:c79::/48