TCP SYN (p0f)

4:113+15:0:1452:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:0

first seen 2026-08-16 14:14 · last seen 2026-09-11 06:01 · JSON

Last 7 days (3 observations)

Distinct clients per day (last 30 days, peak 7/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

IP version4
Initial TTL113+15
Options length0
MSS1452
Window sizemss*44
Window scale8
Options layoutmss,nop,ws,nop,nop,sok
Quirksdf,id+
Payload class0

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)

fingerprintco-occurrences
t13d2913h1_723694b0fccc_5671b5df502912
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.11
t13d1515h1_8daaf6152771_de4a06bb82e33
t13d1617h2_86a278354501_3cbfd9057e0d Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 152.0.3, +10 more.The fingerprint page shows the full measured match list. More on the catalog.2
t13d1515h1_8daaf6152771_0a20fe35d3a52
t13d1312h2_f57a46bbacb6_ab7e3b40a677 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.8, go-net/http 1.26.7, +5 more.The fingerprint page shows the full measured match list. More on the catalog.1
t13d201100_2b729b4bf6f3_9e7b989ebec81
t12d2109h1_76e208dd3e22_7af1ed941c261
t13d181000_e8a523a41297_78e6aca7449b1

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr16thth_94fdc06e0694_000000000000_0000000000005
ge11nn13enus_9db22d02e17a_000000000000_0000000000005
ge20nr16eses_94fdc06e0694_000000000000_0000000000003
ge11nr11thth_835281d8e5d9_000000000000_0000000000002
ge11nr11heil_835281d8e5d9_000000000000_0000000000002
ge20nr13eses_9e2b86631664_000000000000_0000000000001
ge11nn11soso_835281d8e5d9_000000000000_0000000000001
ge20nn13enus_50ab73cf8b2c_000000000000_0000000000001
po11nn07frlu_7d361e250c48_000000000000_0000000000001
ge11nn11thth_835281d8e5d9_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
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, +42 more.The fingerprint page shows the full measured match list. More on the catalog.11
1:65536;2:0;4:131072;5:16384|12517377|3:0:0:42|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 154.0, firefox 152.0.5, firefox 152.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog.2
2:0;4:4194304;5:16384;6:10485760|1073741824|0|a,m,p,s Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.8, go-net/http 1.26.7, +6 more.The fingerprint page shows the full measured match list. More on the catalog.1

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-1-3-1-1-4_1452_834

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (iPad; CPU OS 16_7 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.7 Mobile/15E148 Safari/604.14
Mozilla/5.0 (Linux; Android 13; Redmi Note 12) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.363
Mozilla/5.0 (iPhone; CPU iPhone OS 17_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.3 Mobile/15E148 Safari/604.12
curl/8.13.01
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.361
Mozilla/5.0 (iPhone; CPU iPhone OS 17_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.5 Mobile/15E148 Safari/604.11
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.361
WhatsApp/21

Country

fingerprintco-occurrences
TH · Thailand9
ES · Spain6
IL · Israel4
BY · Belarus3
MX · Mexico2
VN · Vietnam2
DE · Germany1
LU · Luxembourg1
CA · Canada1
BR · Brazil1

Network (ASN)

fingerprintco-occurrences
AS23969 · TOT Public Company Limited9
AS3352 · TELEFONICA DE ESPANA S.A.U.6
AS1680 · Cellcom Fixed Line Communication L.P4
AS6697 · Republican Unitary Telecommunication Enterprise Beltelecom3
AS7552 · Viettel Group2
AS174 · Cogent Communications, LLC1
AS3320 · Deutsche Telekom AG1
AS577 · Bell Canada1
AS15958 · CETINdoo-NET1
AS9829 · National Internet Backbone1