Network (ASN)

AS21859

first seen 2026-06-11 06:43 · last seen 2026-10-31 15:46 · JSON

Last 7 days (23 observations)

Distinct clients per day (last 30 days, peak 633/day)

Distinct clients are counted by IP-hash per complete UTC day — unlike observation counts this is insensitive to one chatty client, but NAT merges clients and address rotation splits them.

Decomposed attributes

Network name	`Zenlayer Inc`
Domain	`zenlayer.com`

Co-observed signals

Signals from other families seen in the same observation. A fingerprint spread thinly across many lower-layer signatures is a classic inconsistency signal.

TLS ClientHello (JA4)

fingerprint	co-occurrences
`t13d3013h2_1d37bd780c83_8537cf56674e`	644
`t12d330600_5172cef6ed69_021165082e1c`	127
`t13d1812h1_85036bcba153_d41ae481755e`	28
`t13i1909h1_9dc949149365_97f8aa674fd9`	23
`t12d130600_2d7513195f68_021165082e1c`	19
`t12d180700_4b22cbed5bed_2dae41c691ec`	4
`q13d0311h3_55b375c5d22e_653d80c3fe9d` Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chromium 149.0.7827.102, chrome 149.0.7827.102, +56 more.The fingerprint page shows the full measured match list. More on the catalog.	3
`t13d1516h2_8daaf6152771_d8a2da3f94cd` Match?Exact match in Thumbprint's published controlled catalog captures: chromium 149.0.7827.102, chrome 149.0.7827.102, chrome 149.0.7827.156, +25 more.The fingerprint page shows the full measured match list. More on the catalog.	2
`t12i130500_2d7513195f68_021165082e1c`	2
`t13i1811h1_85036bcba153_d41ae481755e`	2

HTTP request (JA4H)

fingerprint	co-occurrences
`ge20nn030000_bf75ddd0bb29_000000000000_000000000000`	644
`ge11nr040000_e1d2031bdfea_000000000000_000000000000`	154
`ge11nr040000_88d30a62b7ad_000000000000_000000000000`	17
`po20nn07*000_8db2b212706a_000000000000_000000000000`	14
`ge20nn06*000_b74359a06b81_000000000000_000000000000`	14
`ge30nr14enus_186438911b7e_000000000000_000000000000`	3
`ge11nn050000_b223a0ebb0b5_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: python-requests 2.34.2, python-requests 2.33.1, python-requests 2.32.3.The fingerprint page shows the full measured match list. More on the catalog.	3
`ge11nn050000_2469c960a647_000000000000_000000000000`	3
`ge11nn040000_cf1edba2959c_000000000000_000000000000`	1
`ge20nn14enus_186438911b7e_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: chrome 149.0.7827.53, chrome 149.0.7827.155, chromium 149.0.7827.102, +2 more.The fingerprint page shows the full measured match list. More on the catalog.	1

HTTP/2 frames (Akamai)

fingerprint	co-occurrences
`3:100;4:65536;2:0\|1048510465\|0\|m,s,a,p` Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, curl 8.18.0, curl 8.21.0, +8 more.The fingerprint page shows the full measured match list. More on the catalog.	644
`1:4096;2:0;4:65535;5:16384;3:100;6:65536\|16777216\|0\|m,a,s,p` Match?Exact match in Thumbprint's published controlled catalog captures: python-httpx 0.28.1.The fingerprint page shows the full measured match list. More on the catalog.	30
`1:65536;2:0;4:6291456;6:262144\|15663105\|1:1:0:256\|m,a,s,p` Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 151.0.7922.34, chrome 151.0.7922.137, +57 more.The fingerprint page shows the full measured match list. More on the catalog.	3

TCP SYN (p0f)

fingerprint	co-occurrences
`4:55+9:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	153
`4:52+12:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	150
`4:51+13:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	103
`4:46+18:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	84
`4:53+11:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	77
`4:47+17:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	54
`4:48+16:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	53
`4:54+10:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	47
`4:50+14:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	24
`4:56+8:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	22

TCP SYN (JA4T)

fingerprint	co-occurrences
`64240_2-4-8-1-3_1460_7`	794
`64800_2-4-8-1-3_1440_7`	28
`64240_2-4-8-1-3_1460_8`	4
`65535_2-1-3-1-1-4_1380_8`	2
`32767_2-4-8-1-3_1440_9`	2
`65535_2-4-8-1-3_1400_7`	1
`64860_2-1-3-1-1-4_1380_8`	1
`65535_2-4-8-1-3_1300_6`	1
`65535_2-4-8-1-3_1240_8`	1

QUIC transport params

fingerprint	co-occurrences
`q13_313ab9afcaf5` Match?Exact match in Thumbprint's published controlled catalog captures: chromium 149.0.7827.102, chrome 149.0.7827.102, edge 149.0.4022.52, +6 more.The fingerprint page shows the full measured match list. More on the catalog.	2
`q14_3a9b21a290be`	1
`q12_97eeb91f9c98` Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chrome 152.0.7977.83, chrome 151.0.7922.137, +64 more.The fingerprint page shows the full measured match list. More on the catalog.	1

User-Agent

fingerprint	co-occurrences
`curl/8.14.1`	644
`Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.6312.86 Safari/537.36`	171
`python-httpx/0.28.1`	30
`Mozilla/5.0`	3
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36`	3
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36`	2
`Mozilla/5.0 (Windows NT 10.0; Win64; rv:143.0) Gecko/20100101 Firefox/143.0`	2
`Mozilla/5.0 (Macintosh; Intel Mac OS X) AppleWebKit/605.1.15 FeedReportFullText/1.0`	2
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36`	1
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.36`	1

Country

fingerprint	co-occurrences
`US` · United States	439
`NL` · Netherlands	78
`SG` · Singapore	58
`AU` · Australia	40
`DE` · Germany	40
`FI` · Finland	39
`CA` · Canada	38
`GB` · United Kingdom	30
`IT` · Italy	30
`ES` · Spain	22

TLS supported groups

fingerprint	co-occurrences
`11ec,001d,0017,001e,0018,0019,0100,0101` Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 24.22.1, python-httpx 0.28.1, python-requests 2.34.2, +2 more.The fingerprint page shows the full measured match list. More on the catalog.	644
`0017,0018,0019`	24
`001d,0017,001e,0019,0018,0100,0101,0102,0103,0104` Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, php-guzzle 8.3.1, curl 7.88.1, +10 more.The fingerprint page shows the full measured match list. More on the catalog.	5
`11ec,001d,0017,0018,0019` Match?Exact match in Thumbprint's published controlled catalog captures: firefox 157.0.1, firefox-esr 153.5.1esr, firefox 158.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog.	5