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

AS21859 — ZEN-ECN

Zenlayer Inc

AS21859 is a major transit provider operated by Zenlayer Inc, established in the United States in 2013. The network announces a solid 700 928 IPv4 addresses, including a /16. Supports IPv6.

  • 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
March 04, 2026

Prefix Summary

IPv4 Prefixes (raw / aggregated)
1 613 / 543
IPv6 Prefixes (raw / aggregated)
140 / 79
IPv4 Addresses
700 928
Largest IPv4 Prefix
/16 (65 536 addresses)
Largest IPv6 Prefix
/32
Geolocated Countries
🇺🇸 US (258 IPs), 🇰🇷 KR (14 IPs), 🇭🇰 HK (106 IPs), 🇸🇬 SG, 🇩🇪 DE, 🇮🇳 IN, 🇬🇧 GB, 🇨🇳 CN, 🇻🇳 VN, 🇯🇵 JP, 🇮🇩 ID, 🇹🇼 TW, 🇵🇭 PH, 🇱🇦 LA and 26 more
Prefix Changed
March 04, 2026

Reputation

Reputation
Good — 365 flagged IPs out of 700 928 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
59 upstream autonomous systems providing transit
Peers
558 autonomous systems exchanging traffic without transit fees
Downstream Customers
202 downstream autonomous systems buying transit
Degree
844 unique BGP neighbors (providers + customers + peers)
Reach
6 472 — customer cone size measuring network influence
Degree Rank
#177
Reach Rank
#514

Upstream Providers (59)

Prefix Lists

IPv4 Prefixes (1 613 total)

  • 128.1.0.0/16 (65 536 addresses)
  • 128.14.0.0/16 (65 536 addresses)
  • 129.227.0.0/16 (65 536 addresses)
  • 23.90.128.0/18 (16 384 addresses)
  • 107.151.128.0/18 (16 384 addresses)
  • 107.155.0.0/18 (16 384 addresses)
  • 156.59.0.0/18 (16 384 addresses)
  • 156.59.128.0/18 (16 384 addresses)
  • 23.248.160.0/19 (8 192 addresses)
  • 23.251.96.0/19 (8 192 addresses)
  • 98.96.192.0/19 (8 192 addresses)
  • 98.98.32.0/19 (8 192 addresses)
  • 98.98.64.0/19 (8 192 addresses)
  • 98.98.128.0/19 (8 192 addresses)
  • 98.98.192.0/19 (8 192 addresses)
  • 104.166.128.0/19 (8 192 addresses)
  • 107.148.160.0/19 (8 192 addresses)
  • 156.59.224.0/19 (8 192 addresses)
  • 162.128.160.0/19 (8 192 addresses)
  • 169.197.96.0/19 (8 192 addresses)
  • 192.169.96.0/19 (8 192 addresses)
  • 193.118.32.0/19 (8 192 addresses)
  • 193.118.96.0/19 (8 192 addresses)
  • 23.236.112.0/20 (4 096 addresses)
  • 38.33.144.0/20 (4 096 addresses)
  • 38.183.160.0/20 (4 096 addresses)
  • 38.211.80.0/20 (4 096 addresses)
  • 65.255.32.0/20 (4 096 addresses)
  • 69.28.48.0/20 (4 096 addresses)
  • 98.98.112.0/20 (4 096 addresses)
  • 104.166.160.0/20 (4 096 addresses)
  • 162.128.48.0/20 (4 096 addresses)
  • 192.254.80.0/20 (4 096 addresses)
  • 209.177.80.0/20 (4 096 addresses)
  • 23.236.96.0/21 (2 048 addresses)
  • 45.40.48.0/21 (2 048 addresses)
  • 45.43.40.0/21 (2 048 addresses)
  • 98.96.224.0/21 (2 048 addresses)
  • 98.96.240.0/21 (2 048 addresses)
  • 98.98.0.0/21 (2 048 addresses)
  • 98.98.24.0/21 (2 048 addresses)
  • 98.98.168.0/21 (2 048 addresses)
  • 98.98.248.0/21 (2 048 addresses)
  • 104.166.184.0/21 (2 048 addresses)
  • 104.218.160.0/21 (2 048 addresses)
  • 114.114.112.0/21 (2 048 addresses)
  • 122.10.152.0/21 (2 048 addresses)
  • 154.193.248.0/21 (2 048 addresses)
  • 156.59.64.0/21 (2 048 addresses)
  • 156.59.80.0/21 (2 048 addresses)

IPv6 Prefixes (140 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
  • 2604:980:1000::/36
  • 2604:980:7000::/36
  • 2604:980:d000::/36
  • 2a0b:21c0:1000::/36
  • 2a0b:21c1:1000::/36
  • 2a0b:21c1:3000::/36
  • 2a0b:21c1:5000::/36
  • 2602:ffe4::/37
  • 2602:ffe4:800::/38
  • 2602:ffe4:c48::/45
  • 2602:ffe4:c50::/46
  • 2604:980:e004::/46
  • 2604:980:e00c::/46
  • 2602:ffe4:c02::/47
  • 2602:ffe4:c06::/47
  • 2602:ffe4:c0a::/47
  • 2602:ffe4:c12::/47
  • 2602:ffe4:c14::/47
  • 2602:ffe4:c18::/47
  • 2602:ffe4:c20::/47
  • 2602:ffe4:c26::/47
  • 2602:ffe4:c40::/47
  • 2602:ffe4:c44::/47
  • 2602:ffe4:c56::/47
  • 2602:ffe4:c64::/47
  • 2602:ffe4:c6c::/47
  • 2602:ffe4:c7a::/47
  • 2602:ffe4:c9c::/47
  • 2604:980:e000::/47
  • 2604:980:e00a::/47
  • 2604:980:e034::/47
  • 2a0b:21c1:6008::/47
  • 2a0b:21c1:6010::/47
  • 2a10:3c0:4::/47
  • 2404:3700::/48
  • 240d:c010:14b::/48
  • 240d:c010:14c::/48
  • 2602:ffe4:c01::/48
  • 2602:ffe4:c05::/48
  • 2602:ffe4:c09::/48
  • 2602:ffe4:c0d::/48
  • 2602:ffe4:c11::/48
  • 2602:ffe4:c16::/48