HTTP/2 frames (Akamai)

1:4096;2:0;4:65535;5:16384;3:100;6:65536|16777216|0|m,a,s,p

first seen 2026-06-12 21:38 · last seen 2026-10-28 09:36 · JSON

Last 7 days (4 observations)

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": 4096, "2": 0, "3": 100, "4": 65535, "5": 16384, "6": 65536}
WINDOW_UPDATE16777216
PRIORITY frames0
Pseudo-header orderm,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)

fingerprintco-occurrences
t13d1812h1_85036bcba153_d41ae481755e62
t13d3013h1_1d37bd780c83_ecd0401ec68b10
t13d1713h1_ab0a1bf427ad_ecd0401ec68b 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.4
t13d3112h1_e8f1e7e78f70_d41ae481755e3
t13d1712h1_ab0a1bf427ad_8e6e362c5eac3
t13i1811h1_85036bcba153_d41ae481755e2
t13i1712h1_ab0a1bf427ad_ecd0401ec68b2
t13d4312h1_c7886603b240_24695f2957a72
t12d3806h1_10ed599f3404_67a080e8974e1

HTTP request (JA4H)

fingerprintco-occurrences
po20nn07*000_8db2b212706a_000000000000_00000000000023
ge20nn06*000_b74359a06b81_000000000000_00000000000023
ge20nn060000_9606e9a08f5b_000000000000_00000000000012
ge20nn04enus_ded3c6d8f0eb_000000000000_0000000000009
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.4
ge20nn040000_c3abebcf3d28_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.3
ge20nn08engb_c4bf040e0aa1_000000000000_0000000000003
po20nn08*000_b01858152300_000000000000_0000000000002
ge20nn07*000_11cdd62b56ea_000000000000_0000000000002
ge20nn030000_80b089f68b8e_000000000000_0000000000002

TCP SYN (p0f)

fingerprintco-occurrences
6:52+12:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:018
6:48+16:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:010
6:51+13:0:1440:62587,7:mss,sok,ts,nop,ws:flow:07
6:47+17:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:06
6:41+23:0:1440:mss*30,11:mss,sok,ts,nop,ws:flow:05
6:46+18:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:04
6:55+9:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:04
6:53+11:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:04
6:42+22:0:1440:mss*30,11:mss,sok,ts,nop,ws:flow:04
4:43+21:0:1460:mss*44,10:mss,sok,ts,nop,ws::03

TCP SYN (JA4T)

fingerprintco-occurrences
64800_2-4-8-1-3_1440_752
43200_2-4-8-1-3_1440_119
62587_2-4-8-1-3_1440_78
64240_2-4-8-1-3_1460_103
64800_2-4-8-1-3_1440_102
62727_2-4-8-1-3_1460_71
64860_2-4-8-1-3_1380_71
62727_2-4-8-1-3_1460_101
65535_2-4-8-1-3_1380_61
8192_2-1-3-1-1-4_1460_81

User-Agent

fingerprintco-occurrences
python-httpx/0.28.157
Pandalytics/2.0 (+https://domainsbot.com/network-crawler-pandalytics-kdc68dhsbd/)12
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.363
DataFoundationResearch/0.1 (+contact@example.com)3
uk-nhs-data/0.0 (internal fraud-research)3
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:133.0) Gecko/20100101 Firefox/133.02
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 11.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:133.0) Gecko/20100101 Firefox/133.01

Country

fingerprintco-occurrences
US · United States32
NL · Netherlands20
IE · Ireland12
DE · Germany11
GB · United Kingdom4
RU · Russia3
SG · Singapore2
SE · Sweden2
RO · Romania1
BE · Belgium1

Network (ASN)

fingerprintco-occurrences
AS21859 · Zenlayer Inc30
AS211680 · NSEC - Sistemas Informaticos, S.A.20
AS16509 · Amazon.com, Inc.14
AS197540 · netcup GmbH9
AS8468 · ENTANET International Limited3
AS14061 · DigitalOcean, LLC2
AS24940 · Hetzner Online GmbH2
AS50340 · JSC Selectel2
AS214379 · South Park Networks LLC2
AS174 · Cogent Communications, LLC1

TLS supported groups

fingerprintco-occurrences
001d,0017,001e,0019,0018,0100,0101,0102,0103,0104 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, php-guzzle 8.3.1, curl 7.88.1, +10 more.The fingerprint page shows the full measured match list. More on the catalog.10
11ec,001d,0017,001e,0018,0019,0100,0101 Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 24.22.1, python-httpx 0.28.1, python-requests 2.34.2, +2 more.The fingerprint page shows the full measured match list. More on the catalog.5
001d,0017,001e,0019,00181