HTTP/2 frames (Akamai)

4:16777216|16711681|0|m,p,a,s

first seen 2026-06-11 16:05 · last seen 2026-11-01 17:50 · JSON

Last 7 days (9 observations)

Distinct clients per day (last 30 days, peak 3/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	`{"4": 16777216}`
WINDOW_UPDATE	`16711681`
PRIORITY frames	`0`
Pseudo-header order	`m,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)

fingerprint	co-occurrences
`t13d1513h2_8daaf6152771_eca864cca44a`	112
`t13d1114h2_5e2a75874763_89e9e4bb3419`	66
`t13d1514h2_8daaf6152771_43ade6aba3df`	24
`t13d1514h2_8daaf6152771_a5b99884f7f5`	16
`t12d1209h2_d34a8e72043a_b39be8c56a14`	4
`t13d1515h2_8daaf6152771_e8ed158c4d85`	3
`t12d1208h2_d34a8e72043a_31a7e1922da8`	2
`t12d0812h2_6aee0a5c6037_70b99c08f466`	1
`t13d1512h2_8daaf6152771_40271e0a5736`	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 1.27.1, go-net/http 1.27.3, +14 more.The fingerprint page shows the full measured match list. More on the catalog.	84
`ge20nn030000_80b089f68b8e_000000000000_000000000000`	54
`ge20nn020000_fb4f949fd323_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: powershell 7.6.6, powershell 7.6.9, powershell 7.6.8.The fingerprint page shows the full measured match list. More on the catalog.	34
`ge20nn030000_ce733c3c54ce_000000000000_000000000000`	15
`ge20nn030000_6dac75bd47eb_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: python-httpx 0.28.1.The fingerprint page shows the full measured match list. More on the catalog.	13
`ge20nn040000_45d26b037ca1_000000000000_000000000000`	11
`ge20nn030000_ff50983941c1_000000000000_000000000000`	6
`ge20nn030000_b74f9ffb1cea_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.23.12.The fingerprint page shows the full measured match list. More on the catalog.	4
`ge20nn04enus_39a3ba4480e8_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: urlsession 6.1.2.The fingerprint page shows the full measured match list. More on the catalog.	3
`ge20nn10enus_5229ea5d115b_000000000000_000000000000`	1

TCP SYN (p0f)

fingerprint	co-occurrences
`4:48+16:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:0`	29
`4:117+11:0:1460:62727,10:mss,sok,ts,nop,ws:df,id+:0`	24
`4:54+10:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:0`	17
`4:50+14:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:0`	14
`4:117+11:0:1440:65535,8:mss,nop,ws,sok,ts:df,id+:0`	13
`4:119+9:0:1460:62727,7:mss,sok,ts,nop,ws:df,id+:0`	12
`4:55+9:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	10
`4:49+15:0:1452:65535,10:mss,sok,ts,nop,ws:df,id+:0`	9
`4:49+15:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:0`	8
`4:119+9:0:1460:62727,10:mss,sok,ts,nop,ws:df,id+:0`	6

TCP SYN (JA4T)

fingerprint	co-occurrences
`64240_2-4-8-1-3_1460_10`	71
`62727_2-4-8-1-3_1460_10`	38
`64240_2-4-8-1-3_1460_7`	26
`65535_2-1-3-4-8_1440_8`	13
`64800_2-4-8-1-3_1440_10`	9
`65535_2-4-8-1-3_1452_10`	9
`62727_2-4-8-1-3_1460_7`	8
`65535_2-4-8-1-3_1440_8`	6
`65535_2-4-8-1-3_1460_8`	6
`65535_2-4-8-1-3_1452_8`	4

User-Agent

fingerprint	co-occurrences
`Harmonic-HN-Android/3.0.1/release`	33
`okhttp/5.3.0`	27
`Mozilla/5.0 (iPhone; CPU iPhone OS 18_7_8 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.0 Mobile/15E148 Safari/604.1`	23
`okhttp/4.9.2`	23
`okhttp/4.12.0`	21
`okhttp/3.14.9`	13
`Ktor client`	11
`ktor-client`	10
`okhttp/5.5.0`	10
`tcpfp/1`	6

Country

fingerprint	co-occurrences
`US` · United States	127
`NL` · Netherlands	23
`DE` · Germany	15
`RU` · Russia	14
`CA` · Canada	12
`FR` · France	6
`AU` · Australia	4
`LB` · Lebanon	4
`CN` · China	3
`IN` · India	3

Network (ASN)

fingerprint	co-occurrences
`AS132892` · Cloudflare, Inc.	54
`AS14618` · Amazon.com, Inc.	50
`AS202623` · Cloudflare Inc	23
`AS12389` · PJSC Rostelecom	13
`AS577` · Bell Canada	9
`AS35042` · Layer7 Networks GmbH	9
`AS174` · Cogent Communications, LLC	5
`AS9051` · IncoNet Data Management sal	4
`AS16276` · OVH SAS	3
`AS7922` · Comcast Cable Communications, LLC	3

TLS supported groups

fingerprint	co-occurrences
`001d,0017,0018,0019,001e,0100,0101,0102,0103,0104` Match?Exact match in Thumbprint's published controlled catalog captures: java-httpclient 17.0.19, java-httpclient 11.0.31, java-urlconnection 17.0.19, +2 more.The fingerprint page shows the full measured match list. More on the catalog.	12
`001d,0017,0018` Match?Exact match in Thumbprint's published controlled catalog captures: rust-reqwest 0.12.28, rust-reqwest 0.11.27, winhttp 10.0.20348.1, +2 more.The fingerprint page shows the full measured match list. More on the catalog.	2