TCP SYN (p0f)

4:41+23:0:1452:65535,6:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-20 08:50 · last seen 2026-09-14 17:44 · JSON

Last 7 days (4 observations)

Distinct clients per day (last 30 days, peak 9/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 TTL41+23
Options length0
MSS1452
Window size65535
Window scale6
Options layoutmss,sok,ts,nop,ws
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
t13d4412h1_fd39b124ee10_58ed7828516f43
t13d1515h1_8daaf6152771_de4a06bb82e328
t13d1515h1_8daaf6152771_0a20fe35d3a515
t13d1516h1_8daaf6152771_1a63afa7c4782
t13d1516h2_8daaf6152771_02713d6af862 Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 134.0.6998.35, chromium 133.0.6943.16.The fingerprint page shows the full measured match list. More on the catalog.1
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.1
t13d2812h2_257f3020b3a2_cbb9361b6bf91

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.43
ge11nn13enus_9db22d02e17a_000000000000_00000000000034
ge11nn14enus_4a2973d235de_000000000000_00000000000011
ge20nr13zhcn_e2ac93ffb364_000000000000_0000000000001
ge20nn140000_02563f2d0fa8_000000000000_0000000000001
ge20nn020000_b89ce445e0b3_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13, go-net/http 1.27.0, go-net/http 1.26.6, +10 more.The fingerprint page shows the full measured match list. More on the catalog.1

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.2
1:65536;2:0;4:6291456;6:262144|15663105|1:0:0:256|m,a,s,p1

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-4-8-1-3_1452_691

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.367
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.67 Safari/537.365
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.365
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.364
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.363
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 Safari/537.363
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.363
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.363
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.363
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.363

Country

fingerprintco-occurrences
BR · Brazil22
VN · Vietnam17
UZ · Uzbekistan13
AR · Argentina8
AE · United Arab Emirates6
IL · Israel4
ZA · South Africa4
NP · Nepal2
PY · Paraguay2
PS · Palestinian Territories2

Network (ASN)

fingerprintco-occurrences
AS45899 · VNPT Corp15
AS43060 · IPLUS LLC7
AS5384 · Emirates Internet6
AS1680 · Cellcom Fixed Line Communication L.P4
AS328471 · HERO TELECOMS (PTY) LTD4
AS57016 · Inform-Service TV Ltd.3
AS8193 · Uzbektelekom Joint Stock Company3
AS263649 · BrPhonia Provedor Ip Ltda3
AS52477 · ApInter2
AS7303 · Telecom Argentina S.A.2