HTTP/2 frames (Akamai)

1:65536;2:0;4:131072;5:16384|12517377|51:0:0:42|m,p,a,s

first seen 2026-10-05 19:14 · last seen 2026-10-05 20:05 · JSON

Distinct clients per day (last 30 days, peak 2/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 frames51:0:0:42
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
t13d1517h2_8daaf6152771_3cbfd9057e0d Match?Exact match in Thumbprint's published controlled catalog captures: firefox 155.0.1, firefox 154.0, firefox 156.0, +7 more.The fingerprint page shows the full measured match list. More on the catalog.1
t13d1517h2_8daaf6152771_6f4c3a25c8011

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr11enus_3901d4197baf_000000000000_0000000000001
ge20nr15enus_88efceda7332_000000000000_0000000000001

TCP SYN (p0f)

fingerprintco-occurrences
4:40+24:0:1380:mss*47,10:mss,sok,ts,nop,ws:df,id+:01
4:48+16:0:1340:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df,ecn:01

TCP SYN (JA4T)

fingerprintco-occurrences
64860_2-4-8-1-3_1380_101
65535_2-1-3-1-1-8-4-0-0_1340_61

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:156.0) Gecko/20100101 Firefox/156.01
Mozilla/5.0 (X11; Linux x86_64; rv:157.0) Gecko/20100101 Firefox/157.01

Country

fingerprintco-occurrences
DE · Germany1
PL · Poland1

Network (ASN)

fingerprintco-occurrences
AS16276 · OVH SAS1
AS43357 · Owl Limited1