HTTP/2 frames (Akamai)

1:65536;2:0;4:131072;5:16384|12517377|21:0:0:42|m,p,a,s

first seen 2026-07-01 01:06 · last seen 2026-10-30 13:41 · JSON

Last 7 days (2 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": 65536, "2": 0, "4": 131072, "5": 16384}
WINDOW_UPDATE12517377
PRIORITY frames21:0:0:42
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
t13d1715h2_5b57614c22b0_a54fffd0eb619
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.6
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.5
t13d1615h2_86a278354501_a54fffd0eb614
t13d0916h2_f91f431d341e_0c27189014cf1
t13d1617h2_86a278354501_3e9721a6796e1
t13d1617h2_46e7e9700bed_3cbfd9057e0d1
t13d1517h2_8daaf6152771_6f4c3a25c8011

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr12enus_a72b71f519fc_000000000000_0000000000008
ge20nr11enus_3901d4197baf_000000000000_0000000000005
ge20nn12enus_a72b71f519fc_000000000000_0000000000004
ge20nr13enus_016d87568c43_000000000000_0000000000002
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, +27 more.The fingerprint page shows the full measured match list. More on the catalog.1
ge20nn12enus_7e62679e718a_000000000000_0000000000001
ge20nr13enus_52a9a314672a_000000000000_0000000000001
ge20nn14enus_d2a148ad830b_000000000000_0000000000001
ge20nr13en00_016d87568c43_000000000000_0000000000001
ge20nn16enus_c03e27744605_000000000000_0000000000001

TCP SYN (p0f)

fingerprintco-occurrences
4:50+14:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:02
4:55+9:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:02
4:56+8:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:43+21:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:01
4:51+13:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:01
4:45+19:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:01
6:47+17:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:01
6:49+15:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:01
4:241+14:0:1420:mss*42,8:mss,nop,ws,sok,eol+1:df,id+:01
6:43+21:0:1440:mss*30,9:mss,nop,nop,ts,nop,ws:flow:01

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1460_107
64800_2-4-8-1-3_1440_72
43200_2-1-1-8-1-3_1440_92
64240_2-4-8-1-3_1460_71
65320_2-4-8-1-3_1420_71
65535_2-1-3-1-1-8-4-0-0_1460_61
64860_2-4-8-1-3_1380_101
65535_2-1-3-1-1-4_1460_81
32768_2-1-3-4-8_1440_101
65535_2-1-3-4-8_1460_61

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (X11; Linux x86_64; rv:140.0) Gecko/20100101 Firefox/140.07
Mozilla/5.0 (X11; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.04
Mozilla/5.0 (X11; Linux x86_64; rv:153.0) Gecko/20100101 Firefox/153.03
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:156.0) Gecko/20100101 Firefox/156.02
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:140.0) Gecko/20100101 Firefox/140.01
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.01
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:152.0) Gecko/20100101 Firefox/152.01

Country

fingerprintco-occurrences
US · United States4
DE · Germany3
NL · Netherlands3
CA · Canada3
AU · Australia2
NO · Norway2
SE · Sweden2
FR · France2
CH · Switzerland1
PL · Poland1

Network (ASN)

fingerprintco-occurrences
AS38195 · Superloop2
AS60729 · Stiftung Erneuerbare Freiheit1
AS212238 · Datacamp Limited1
AS50304 · Blix Solutions AS1
AS16276 · OVH SAS1
AS43357 · Owl Limited1
AS701 · Verizon Business1
AS215125 · Church of Cyberology1
AS25400 · Telia Norge AS1
AS6730 · Sunrise GmbH1

TLS supported groups

fingerprintco-occurrences
11ec,001d,0017,0018,0019,0100,01012
11ec,001d,0017,0018,0019,02021