TCP SYN (JA4T)

65535_2-1-3-1-1-8-4-0-0_1420_6

first seen 2026-08-15 06:14 · last seen 2026-10-28 07:26 · 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 kinds2-1-3-1-1-8-4-0-0
MSS1420
Window scale6

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
t13d2013h2_a09f3c656075_7f0f34a4126d Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, safari 26.6.2, safari 26.4, +2 more.The fingerprint page shows the full measured match list. More on the catalog.6
t13d1812h1_85036bcba153_b26ce05bbdd62
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.2
ge20nn08ja00_b65a39d4559c_000000000000_0000000000002
ge20nr08ja00_1945e0741196_000000000000_0000000000002
ge20nn08ja00_1945e0741196_000000000000_0000000000002
ge11nn06enus_fb4afd1f380a_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;3:100;4:2097152;9:1|10420225|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, safari 26.6.2, safari 26.5, +3 more.The fingerprint page shows the full measured match list. More on the catalog.6

TCP SYN (p0f)

fingerprintco-occurrences
4:51+13:0:1420:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df,ecn:03
4:50+14:0:1420:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df,ecn:03
6:47+17:0:1420:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:ecn,flow:01
6:47+17:0:1420:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:flow:01
4:56+8:0:1420:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df,ecn:01

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/27.0.1 Safari/605.1.154
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.6.2 Safari/605.1.152
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 Chrome/124 Safari/537.361

Country

fingerprintco-occurrences
JP · Japan6
IN · India2
PH · Philippines1

Network (ASN)

fingerprintco-occurrences
AS2516 · KDDI CORPORATION6
AS55577 · Atria Convergence Technologies Ltd.,2
AS9299 · Philippine Long Distance Telephone Company1

TLS supported groups

fingerprintco-occurrences
0a0a,11ec,001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: urlsession 6.3.3, safari 26.6.2.The fingerprint page shows the full measured match list. More on the catalog.1