TCP SYN (p0f)

4:115+13:0:1412:65535,8:mss,nop,ws,nop,nop,sok:df,id+:0

first seen 2026-07-24 10:54 · last seen 2026-09-09 15:55 · JSON

Last 7 days (1 observations)

Distinct clients per day (last 30 days, peak 5/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 TTL115+13
Options length0
MSS1412
Window size65535
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
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.7
t13d2913h1_723694b0fccc_5671b5df50297
t13d1515h1_8daaf6152771_0a20fe35d3a52
t13d4412h1_fd39b124ee10_58ed7828516f1
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
t13d1515h1_8daaf6152771_de4a06bb82e31

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn11enus_fbd2b2d6b2d7_000000000000_0000000000002
ge11nr11nbno_835281d8e5d9_000000000000_0000000000002
ge11nn14enus_4a2973d235de_000000000000_0000000000002
ge20nr16dede_94fdc06e0694_000000000000_0000000000001
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.1
ge20nr16eses_94fdc06e0694_000000000000_0000000000001
ge11nr11soso_835281d8e5d9_000000000000_0000000000001
ge11nr11soso_b350a6a7c155_000000000000_0000000000001
ge11nr11ensg_b350a6a7c155_000000000000_0000000000001
ge11nn11ensg_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, +43 more.The fingerprint page shows the full measured match list. More on the catalog.6
4:2097152|5177345|1:1:0:256|m,s,a,p1
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
65535_2-1-3-1-1-4_1412_819

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.363
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.362
Mozilla/5.0 (iPhone; CPU iPhone OS 18_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.0 Mobile/15E148 Safari/604.12
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/604.12
Mozilla/5.0 (iPhone; CPU iPhone OS 18_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.1 Mobile/15E148 Safari/604.11
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.67 Safari/537.361
Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.0.3016 Safari/537.361
Mozilla/5.0 (iPhone; CPU iPhone OS 17_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.1 Mobile/15E148 Safari/604.11
Mozilla/5.0 (Linux; Android 14; Pixel 8 Pro) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.361
Mozilla/5.0 (Linux; Android 13; Pixel 4a) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.361

Country

fingerprintco-occurrences
MA · Morocco5
MX · Mexico4
BY · Belarus2
SA · Saudi Arabia2
SO · Somalia2
DE · Germany1
ID · Indonesia1
ES · Spain1
PK · Pakistan1

Network (ASN)

fingerprintco-occurrences
AS36903 · Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM5
AS8151 · Uninet S.A. de C.V.3
AS25019 · Saudi Telecom Company JSC2
AS6697 · Republican Unitary Telecommunication Enterprise Beltelecom2
AS37371 · Hormuud Telecom Somalia INC2
AS23693 · PT. Telekomunikasi Selular1
AS3209 · Vodafone GmbH1
AS17072 · TOTAL PLAY TELECOMUNICACIONES, S.A.P.I. DE C.V.1
AS17557 · Pakistan Telecommunication Company Limited1
AS200845 · AVATEL TELECOM, SA1