TCP SYN (p0f)

4:49+15:0:1400:65535,8:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-20 12:56 · last seen 2026-10-28 04:56 · JSON

Last 7 days (5 observations)

Distinct clients per day (last 30 days, peak 3/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 TTL49+15
Options length0
MSS1400
Window size65535
Window scale8
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_58ed7828516f27
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.20
t13d1515h1_8daaf6152771_0a20fe35d3a515
t13d1515h1_8daaf6152771_de4a06bb82e311
t13d1518h2_8daaf6152771_4980c97edce06
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.5
t13d131100_f57a46bbacb6_ab7e3b40a677 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.5, go-net/http 1.26.4.The fingerprint page shows the full measured match list. More on the catalog.5
t13d4312h1_c7886603b240_b26ce05bbdd61

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.28
ge11nn13enus_9db22d02e17a_000000000000_00000000000016
ge20nr11enus_774bc4686a88_000000000000_00000000000011
ge11nn14enus_4a2973d235de_000000000000_00000000000010
ge20nn13enus_e2ac93ffb364_000000000000_0000000000004
ge20nr12enus_54b4638ab28b_000000000000_000000000000 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, +58 more.The fingerprint page shows the full measured match list. More on the catalog.2
ge20nn12enus_60f823d07c94_000000000000_0000000000002
ge20nr13enus_b3e540f310f0_000000000000_0000000000002
ge20nn14enus_00c893c2b404_000000000000_0000000000002
ge20nn11enus_7eebd24fec8e_000000000000_0000000000002

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:6291456;6:262144|15663105|1:1:0:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chromium 149.0.7827.102, chrome 152.0.7977.83, +81 more.The fingerprint page shows the full measured match list. More on the catalog.4
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
1:65536;2:0;4:6291456;6:262144|15663105|3:1:0:256|m,a,s,p1
1:65536;2:0;4:6291456;6:262144|15663105|5:1:0:256|m,a,s,p1
1:65536;2:0;4:6291456;6:262144|15663105|9:1:0:256|m,a,s,p1
1:65536;2:0;4:6291456;6:262144|15663105|11:1:0:256|m,a,s,p1
1:65536;2:0;3:1000;4:6291456;6:262144;60074:3303022691|15663105|1:1:0:256|m,a,s,p1
1:65536;2:0;3:1000;4:6291456;6:262144;14938:4120955011|15663105|1:1:0:220|m,a,s,p1
1:65536;2:0;3:1000;4:6291456;6:262144;55914:3971779391|15663105|1:1:0:220|m,a,s,p1
1:65536;2:0;3:1000;4:6291456;6:262144;60090:555371026|15663105|1:1:0:256|m,a,s,p1

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-4-8-1-3_1400_890

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.0.0 Mobile Safari/537.3620
Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/154.0.0.0 Mobile Safari/537.366
Mozilla/5.0 (Linux; Android 12; Pixel 9 Pro Build/UP1A.231005.007; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/148.0.7778.120 Mobile Safari/537.365
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.364
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
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.363
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.67 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/537.362
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/119.0.0.0 Safari/537.362

Country

fingerprintco-occurrences
US · United States31
PK · Pakistan10
SY · Syria8
NG · Nigeria6
ET · Ethiopia6
BR · Brazil5
MX · Mexico4
IQ · Iraq3
IT · Italy2
MA · Morocco2

Network (ASN)

fingerprintco-occurrences
AS22773 · Cox Communications Inc.31
AS59257 · CMPak Limited7
AS29256 · STE PDN Internal AS7
AS24757 · Ethio Telecom6
AS36873 · Airtel Networks Limited5
AS17072 · TOTAL PLAY TELECOMUNICACIONES, S.A.P.I. DE C.V.4
AS36903 · Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM2
AS30722 · Fastweb SpA2
AS199739 · Earthlink Telecommunications Equipment Trading & Services DMCC2
AS9198 · JSC Kazakhtelecom1

TLS supported groups

fingerprintco-occurrences
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