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

AS21859 · ZEN-ECN

Zenlayer Inc

AS21859 is operated by Zenlayer Inc and serves as a major transit provider, based in the United States since 2013. The system announces a solid 704 256 IPv4 addresses, including a /16, and supports IPv6. Most of its address space is geolocated to the United States, with additional presence in Hong Kong SAR China and Singapore, and smaller footprints in 36 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
April 28, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
1 624 / 544
IPv6 Prefixes (raw / aggregated)
143 / 83
IPv4 Addresses
704 256
Largest IPv4 Prefix
/16 (65 536 addresses)
Largest IPv6 Prefix
/32
Geolocated Countries
🇺🇸 United States (478 976 IPs), 🇭🇰 Hong Kong SAR China (123 392 IPs), 🇸🇬 Singapore (68 864 IPs) and 36 more
Prefix Changed
April 29, 2026

Reputation

Reputation
Good — 301 flagged IPs out of 704 256 total (0.04%)
Tor Exit Nodes
2 known Tor exit nodes in this network
Open Proxies
3 known open proxies in this network

Connectivity Summary

Upstream Providers
64 upstreams providing transit
Peers
558 networks exchanging traffic without transit
Downstream Customers
213 downstreams buying transit
Unclassified
24 unclassified BGP neighbors
Degree
859 unique BGP neighbors
Reach
6 221 networks in customer cone

Upstream Providers (64)

  • AS174 — COGENT-174 (Tier-1 transit)
  • AS3356 — LEVEL3 (Tier-1 transit)
  • AS6461 — ZAYO-6461 (Tier-1 transit)
  • AS9002 — RETN-AS
  • AS1299 — TWELVE99 (Tier-1 transit)
  • AS3216 — SOVAM-AS
  • AS7195 — EDGEUNO
  • AS20764 — RASCOM-AS
  • AS13335 — CLOUDFLARENET
  • AS3257 — GTT-BACKBONE (Tier-1 transit)
  • and 54 more

Prefix Lists

IPv4 Prefixes (1 624 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))
  • 107.151.128.0/18 (16 384 addresses (/18 prefix))
  • 107.155.0.0/18 (16 384 addresses (/18 prefix))
  • 156.59.128.0/18 (16 384 addresses (/18 prefix))
  • 23.90.128.0/18 (16 384 addresses (/18 prefix))
  • 129.227.0.0/18 (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))
  • 104.166.128.0/19 (8 192 addresses (/19 prefix))
  • 98.98.128.0/19 (8 192 addresses (/19 prefix))
  • 193.118.32.0/19 (8 192 addresses (/19 prefix))
  • 156.59.224.0/19 (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))
  • 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))
  • 162.128.160.0/19 (8 192 addresses (/19 prefix))
  • 107.148.160.0/19 (8 192 addresses (/19 prefix))
  • 192.169.96.0/19 (8 192 addresses (/19 prefix))
  • 98.96.192.0/19 (8 192 addresses (/19 prefix))
  • 193.118.96.0/19 (8 192 addresses (/19 prefix))
  • 23.236.112.0/20 (4 096 addresses (/20 prefix))
  • 38.183.160.0/20 (4 096 addresses (/20 prefix))
  • 162.128.48.0/20 (4 096 addresses (/20 prefix))
  • 38.33.144.0/20 (4 096 addresses (/20 prefix))
  • 65.255.32.0/20 (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))
  • 98.98.112.0/20 (4 096 addresses (/20 prefix))
  • 69.28.48.0/20 (4 096 addresses (/20 prefix))
  • 162.128.208.0/20 (4 096 addresses (/20 prefix))
  • 104.166.160.0/20 (4 096 addresses (/20 prefix))
  • 129.227.112.0/20 (4 096 addresses (/20 prefix))
  • 38.211.80.0/20 (4 096 addresses (/20 prefix))
  • 129.227.104.0/21 (2 048 addresses (/21 prefix))
  • 154.193.248.0/21 (2 048 addresses (/21 prefix))
  • 23.236.96.0/21 (2 048 addresses (/21 prefix))
  • 199.241.0.0/21 (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))
  • 199.245.56.0/21 (2 048 addresses (/21 prefix))
  • 202.165.216.0/21 (2 048 addresses (/21 prefix))
  • 204.115.128.0/21 (2 048 addresses (/21 prefix))
  • 162.221.192.0/21 (2 048 addresses (/21 prefix))
  • 98.96.240.0/21 (2 048 addresses (/21 prefix))
  • 122.10.152.0/21 (2 048 addresses (/21 prefix))
  • and 494 more

IPv6 Prefixes (143 total)

  • 2607:a400::/32
  • 2a0b:21c0:8000::/33
  • 2a0b:21c0:4000::/34
  • 2604:980:8000::/34
  • 2604:980:2000::/35
  • 2604:980:4000::/35
  • 2a0b:21c0:2000::/35
  • 2604:980:7000::/36
  • 2a0b:21c0:1000::/36
  • 2604:980:d000::/36
  • 2a0b:21c1:1000::/36
  • 2a0b:21c1:3000::/36
  • 2a0b:21c1:5000::/36
  • 2604:980:1000::/36
  • 2602:ffe4::/37
  • 2602:ffe4:800::/38
  • 2602:ffe4:c48::/45
  • 2604:980:e00c::/46
  • 2604:980:e004::/46
  • 2602:ffe4:c50::/46
  • 2604:980:e00a::/47
  • 2602:ffe4:c64::/47
  • 2a10:3c0:4::/47
  • 2602:ffe4:c26::/47
  • 2a0b:21c1:6010::/47
  • 2a0b:21c1:6008::/47
  • 2602:ffe4:c02::/47
  • 2602:ffe4:c06::/47
  • 2604:980:e034::/47
  • 2602:ffe4:c40::/47
  • 2602:ffe4:c0a::/47
  • 2602:ffe4:c44::/47
  • 2604:980:e000::/47
  • 2602:ffe4:c14::/47
  • 2602:ffe4:c18::/47
  • 2602:ffe4:c56::/47
  • 2602:ffe4:c20::/47
  • 2602:ffe4:c9c::/47
  • 2602:ffe4:c7a::/47
  • 2602:ffe4:c6c::/47
  • 2602:ffe4:c1a::/48
  • 2602:ffe4:c42::/48
  • 2602:ffe4:c6e::/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
  • and 33 more