HTTP/2 frames (Akamai)

1:65536;2:0;4:131072;5:16384|12517377|11:0:0:22|m,p,a,s

first seen 2026-06-29 21:54 · last seen 2026-10-09 13:46 · JSON

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

SETTINGS{"1": 65536, "2": 0, "4": 131072, "5": 16384}
WINDOW_UPDATE12517377
PRIORITY frames11:0:0:22
Pseudo-header orderm,p,a,s

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
t13d1617h2_86a278354501_3cbfd9057e0d Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 152.0.3, +10 more.The fingerprint page shows the full measured match list. More on the catalog.3
t13d1717h2_5b57614c22b0_3cbfd9057e0d Match?Exact match in Thumbprint's published controlled catalog captures: firefox 148.0.2, firefox 144.0.2, firefox 142.0.1, +6 more.The fingerprint page shows the full measured match list. More on the catalog.1
t13d1517h2_8daaf6152771_3cbfd9057e0d Match?Exact match in Thumbprint's published controlled catalog captures: firefox 155.0.1, firefox 154.0, firefox 156.0, +8 more.The fingerprint page shows the full measured match list. More on the catalog.1
t13d1617h2_46e7e9700bed_3cbfd9057e0d1
t13d0616h2_da75d768228b_7bfe479b16971

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr10enus_b3034183f430_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 155.0.1, +28 more.The fingerprint page shows the full measured match list. More on the catalog.4
ge20nr12enus_979a40433f82_000000000000_0000000000001
ge20nn10enus_b3034183f430_000000000000_0000000000001
ge20nr12de00_979a40433f82_000000000000_0000000000001

TCP SYN (p0f)

fingerprintco-occurrences
4:43+21:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:01
4:54+10:0:1460:mss*44,8:mss,sok,ts,nop,ws:df,id+:01
4:53+11:0:1460:mss*44,9:mss,sok,ts,nop,ws:df,id+:01
4:51+13:0:1460:65535,6:mss,nop,ws,sok,ts:df,id+:01
4:57+7:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:01
4:113+15:0:1440:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:01
4:114+14:0:1412:65535,8:mss,nop,ws,nop,nop,sok:df,id+:01

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1460_102
64240_2-1-3-1-1-4_1440_81
64240_2-4-8-1-3_1460_81
65535_2-1-3-4-8_1460_61
65535_2-1-3-1-1-4_1412_81

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (X11; Linux x86_64; rv:140.0) Gecko/20100101 Firefox/140.01
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:140.0) Gecko/20100101 Firefox/140.01
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:151.0) Gecko/20100101 Firefox/151.01
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:151.0) Gecko/20100101 Firefox/151.01
Mozilla/5.0 (X11; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.01
Mozilla/5.0 (Windows NT 6.2; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.0.0 Safari/537.36 Edg/109.0.1518.551
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:156.0) Gecko/20100101 Firefox/156.01

Country

fingerprintco-occurrences
US · United States3
DE · Germany1
ID · Indonesia1
IE · Ireland1
FI · Finland1

Network (ASN)

fingerprintco-occurrences
AS9009 · M247 Europe SRL1
AS57043 · HOSTKEY B.V.1
AS8881 · 1&1 Versatel GmbH1
AS22616 · ZSCALER, INC.1
AS199218 · Proton AG1
AS5466 · Eircom Limited1
AS9657 · Melsa-i-net AS1