HTTP/2 frames (Akamai)

1:65536;2:0;4:6291456;6:262144|15663105|5:0:0:256|m,a,s,p

first seen 2026-07-24 09:43 · last seen 2026-09-06 07:38 · 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": 6291456, "6": 262144}`
WINDOW_UPDATE	`15663105`
PRIORITY frames	`5:0:0:256`
Pseudo-header order	`m,a,s,p`

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)

fingerprint	co-occurrences
`t13d1518h2_8daaf6152771_e2d80978ab2e` Match?Exact match in Thumbprint's published controlled catalog captures: chrome 152.0.7977.83, chrome 152.0.7977.64, chrome 152.0.7977.65, +5 more.The fingerprint page shows the full measured match list. More on the catalog.	3
`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.	2
`t13d0914h2_05c2414c200e_62d62328d588`	1
`t13d1517h2_8daaf6152771_cb7bf5808d99` Match?Exact match in Thumbprint's published controlled catalog captures: chrome 152.0.7977.83, chrome 152.0.7977.64, chrome 152.0.7977.65, +5 more.The fingerprint page shows the full measured match list. More on the catalog.	1

HTTP request (JA4H)

fingerprint	co-occurrences
`ge20nn020000_b89ce445e0b3_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13, go-net/http 1.27.0, go-net/http 1.26.6, +10 more.The fingerprint page shows the full measured match list. More on the catalog.	1
`ge20nn14zhcn_5fd6de39e17b_000000000000_000000000000`	1
`ge20nr14zhcn_fcc5fc78201c_000000000000_000000000000`	1
`ge20nn13zhcn_1e3150b0417e_000000000000_000000000000`	1
`ge20nr13zhcn_af602163b8b9_000000000000_000000000000`	1
`ge20nr14zhcn_c4d430da350c_000000000000_000000000000`	1
`ge20nr13zhcn_050d76f94893_000000000000_000000000000`	1

TCP SYN (p0f)

fingerprint	co-occurrences
`4:111+17:0:1440:65535,8:mss,nop,ws,nop,nop,sok:df,id+:0`	6
`6:55+9:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:0`	1

TCP SYN (JA4T)

fingerprint	co-occurrences
`65535_2-1-3-1-1-4_1440_8`	6
`64800_2-4-8-1-3_1440_7`	1

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/152.0.0.0 Safari/537.36`	6
`Mozilla/5.0 fake-ua/1.0`	1

Country

fingerprint	co-occurrences
`CN` · China	6
`SE` · Sweden	1

Network (ASN)

fingerprint	co-occurrences
`AS4134` · CHINANET BACKBONE	6
`AS214379` · South Park Networks LLC	1