TCP SYN (JA4T)

65535_2-1-3-1-1-8-4-0-0_1452_5

first seen 2026-08-12 21:05 · last seen 2026-10-29 08:59 · JSON

Last 7 days (22 observations)

Distinct clients per day (last 30 days, peak 45/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 kinds2-1-3-1-1-8-4-0-0
MSS1452
Window scale5

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
t13d4312h1_c7886603b240_b26ce05bbdd6280
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.16
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.14
t13d1517h2_8daaf6152771_b1ff8ab2d16f3
t13d1516h2_8daaf6152771_e5627efa2ab12
t13d1313h2_f57a46bbacb6_9249cab70c772
t13d311000_e8f1e7e78f70_a29327ec888c1

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.280
ge20nn13enus_0c2c1d640f3e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 151.0.7922.137, chrome 151.0.7922.170, chrome 151.0.7922.108, +36 more.The fingerprint page shows the full measured match list. More on the catalog.24
ge20nn12enus_60f823d07c94_000000000000_00000000000010
ge20nr020000_fb4f949fd323_000000000000_0000000000002
ge11nn06en00_0a33f8df75b5_000000000000_0000000000001
ge20nr11enus_d3df502de9f6_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, +57 more.The fingerprint page shows the full measured match list. More on the catalog.33
1:65536;2:0;3:1000;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p4

TCP SYN (p0f)

fingerprintco-occurrences
4:49+15:0:1452:65535,5:mss,nop,ws,nop,nop,ts,sok,eol+1:df:060
4:44+20:0:1452:65535,5:mss,nop,ws,nop,nop,ts,sok,eol+1:df:056
4:48+16:0:1452:65535,5:mss,nop,ws,nop,nop,ts,sok,eol+1:df:047
4:43+21:0:1452:65535,5:mss,nop,ws,nop,nop,ts,sok,eol+1:df:038
4:42+22:0:1452:65535,5:mss,nop,ws,nop,nop,ts,sok,eol+1:df:035
4:45+19:0:1452:65535,5:mss,nop,ws,nop,nop,ts,sok,eol+1:df:033
4:41+23:0:1452:65535,5:mss,nop,ws,nop,nop,ts,sok,eol+1:df:019
4:47+17:0:1452:65535,5:mss,nop,ws,nop,nop,ts,sok,eol+1:df:014
4:40+24:0:1452:65535,5:mss,nop,ws,nop,nop,ts,sok,eol+1:df:010
4:39+25:0:1452:65535,5:mss,nop,ws,nop,nop,ts,sok,eol+1:df:02

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.3657
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.3653
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.3643
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.3636
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.3629
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.3627
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.3623
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.3616
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.3611
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.3610

Country

fingerprintco-occurrences
VN · Vietnam315
LA · Laos2
TH · Thailand1

Network (ASN)

fingerprintco-occurrences
AS45899 · VNPT Corp113
AS7552 · Viettel Group111
AS18403 · FPT Telecom Company88
AS24086 · Viettel Corporation3
AS131267 · Star Telecom2
AS17552 · True Online1

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.245
0a0a,11ec,001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 155.0.8059.40, chrome 156.0.8078.73, chromium 156.0.8078.47, +8 more.The fingerprint page shows the full measured match list. More on the catalog.20
0a0a,001d,0017,001811
0a0a,6399,001d,0017,00183