TCP SYN (JA4T)

65535_2-4-8-1-3_1420_9

first seen 2026-07-20 20:20 · last seen 2026-10-26 17:10 · JSON

Last 7 days (1 observations)

Distinct clients per day (last 30 days, peak 1/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

TCP window65535
Option kinds2-4-8-1-3
MSS1420
Window scale9

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
t13d4412h1_fd39b124ee10_58ed7828516f6
t13d1515h1_8daaf6152771_0a20fe35d3a53
t13d4312h1_c7886603b240_b26ce05bbdd61
t13d1515h1_8daaf6152771_de4a06bb82e31

HTTP request (JA4H)

fingerprintco-occurrences
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.7
ge11nn13enus_9db22d02e17a_000000000000_0000000000004

TCP SYN (p0f)

fingerprintco-occurrences
4:49+15:0:1420:65535,9:mss,sok,ts,nop,ws:df,id+:02
4:44+20:0:1420:65535,9:mss,sok,ts,nop,ws:df,id+:02
4:46+18:0:1420:65535,9:mss,sok,ts,nop,ws:df,id+:02
4:50+14:0:1420:65535,9:mss,sok,ts,nop,ws:df,id+:01
4:52+12:0:1420:65535,9:mss,sok,ts,nop,ws:df,id+:01
4:53+11:0:1420:65535,9:mss,sok,ts,nop,ws:df,id+:01
4:42+22:0:1420:65535,9:mss,sok,ts,nop,ws:df,id+:01
4:48+16:0:1420:65535,9:mss,sok,ts,nop,ws:df,id+:01

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.362
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 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 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4500.0 Iron Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.63 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.75 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36 Kinza/6.1.51
Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.107 Safari/537.361

Country

fingerprintco-occurrences
DZ · Algeria3
SN · Senegal2
SE · Sweden1
PT · Portugal1
KW · Kuwait1
PK · Pakistan1
NP · Nepal1
CI · Côte d’Ivoire1

Network (ASN)

fingerprintco-occurrences
AS33779 · Wataniya Telecom Algerie3
AS8346 · SONATEL-AS Autonomous System2
AS2860 · NOS COMUNICACOES, S.A.1
AS21050 · Fast Communication Company Ltd1
AS29571 · Orange Côte d'Ivoire1
AS150683 · FASTTEL BROADBAND (PRIVATE) LIMITED1
AS23752 · Nepal Telecommunications Corporation, Internet Services,1
AS44034 · Hi3G Access AB1

TLS supported groups

fingerprintco-occurrences
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.1