HTTP/2 frames (Akamai)

1:65536;2:0;4:131072;5:16384|12517377|3:0:0:42|m,p,a,s

first seen 2026-06-11 00:12 · last seen 2026-11-01 23:55 · JSON

Last 7 days (45 observations)

Distinct clients per day (last 30 days, peak 12/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 frames3:0:0:42
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
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.455
t13d1517h2_8daaf6152771_3cbfd9057e0d Match?Exact match in Thumbprint's published controlled catalog captures: firefox 155.0.1, firefox 154.0, firefox 156.0, +8 more.The fingerprint page shows the full measured match list. More on the catalog.83
t13d1717h2_5b57614c22b0_3cbfd9057e0d Match?Exact match in Thumbprint's published controlled catalog captures: firefox 148.0.2, firefox 144.0.2, firefox 142.0.1, +6 more.The fingerprint page shows the full measured match list. More on the catalog.78
t13d1715h2_5b57614c22b0_a54fffd0eb6176
t13d1615h2_86a278354501_a54fffd0eb6141
t13d1515h2_8daaf6152771_a54fffd0eb6112
t13d1616h2_86a278354501_0c27189014cf Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 152.0.6, +10 more.The fingerprint page shows the full measured match list. More on the catalog.10
t13d1516h2_8daaf6152771_0c27189014cf Match?Exact match in Thumbprint's published controlled catalog captures: firefox 154.0, firefox 155.0.1, firefox 155.0, +6 more.The fingerprint page shows the full measured match list. More on the catalog.10
t13d1617h2_86a278354501_3e9721a6796e9
t13d1517h2_8daaf6152771_6f4c3a25c8018

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn11enus_3901d4197baf_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 154.0, firefox 152.0.5, firefox 153.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog.80
ge20nn12enus_a72b71f519fc_000000000000_00000000000044
ge20nr12enus_a72b71f519fc_000000000000_00000000000040
ge20nn11ruru_3901d4197baf_000000000000_00000000000031
ge20nr11enus_3901d4197baf_000000000000_00000000000029
ge20nn10ruru_d353d425b0bb_000000000000_00000000000023
ge20nr13enus_47bedc02e943_000000000000_00000000000022
ge20nr13deat_9e2b86631664_000000000000_00000000000021
ge20nr13enus_016d87568c43_000000000000_00000000000015
ge20nn11zhcn_3901d4197baf_000000000000_00000000000015

TCP SYN (p0f)

fingerprintco-occurrences
4:55+9:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:020
4:115+13:0:1460:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:019
4:51+13:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:018
4:112+16:0:1460:65535,8:mss,nop,ws,nop,nop,sok:df,id+:017
4:50+14:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:015
4:111+17:0:1460:65535,8:mss,nop,ws,nop,nop,sok:df,id+:013
4:114+14:0:1460:65535,8:mss,nop,ws,nop,nop,sok:df,id+:013
4:43+21:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:011
4:116+12:0:1460:65535,8:mss,nop,ws,nop,nop,sok:df,id+:011
4:115+13:0:1460:65535,8:mss,nop,ws,nop,nop,sok:df,id+:010

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-1-3-1-1-4_1460_8107
64240_2-1-3-1-1-4_1460_880
64240_2-4-8-1-3_1460_745
64240_2-4-8-1-3_1460_1039
64240_2-1-3-1-1-4_1452_825
64800_2-4-8-1-3_1440_722
65535_2-1-3-1-1-4_1452_820
65535_2-1-3-1-1-4_1412_815
64860_2-4-8-1-3_1380_1013
64240_2-1-3-1-1-4_1440_813

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (X11; Linux x86_64; rv:153.0) Gecko/20100101 Firefox/153.0132
Mozilla/5.0 (Android 14; Mobile; rv:153.0) Gecko/153.0 Firefox/153.0110
Mozilla/5.0 (Android 13; Mobile; rv:153.0) Gecko/153.0 Firefox/153.086
Mozilla/5.0 (X11; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.058
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:140.0) Gecko/20100101 Firefox/140.056
Mozilla/5.0 (X11; Linux x86_64; rv:140.0) Gecko/20100101 Firefox/140.051
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.042
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:153.0) Gecko/20100101 Firefox/153.041
Mozilla/5.0 (X11; Linux x86_64; rv:151.0) Gecko/20100101 Firefox/151.027
Mozilla/5.0 (X11; Linux x86_64; rv:149.0) Gecko/20100101 Firefox/149.019

Country

fingerprintco-occurrences
US · United States87
NL · Netherlands78
DE · Germany58
RU · Russia58
AU · Australia50
CA · Canada43
CH · Switzerland36
FR · France35
AT · Austria28
ES · Spain25

Network (ASN)

fingerprintco-occurrences
AS38195 · Superloop31
AS5483 · Magyar Telekom Plc.19
AS215125 · Church of Cyberology17
AS12389 · PJSC Rostelecom13
AS15557 · Societe Francaise Du Radiotelephone - SFR SA13
AS8447 · A1 Telekom Austria AG13
AS50053 · VDSka hosting12
AS6730 · Sunrise GmbH11
AS8412 · T-Mobile Austria GmbH11
AS212238 · Datacamp Limited10

TLS supported groups

fingerprintco-occurrences
11ec,001d,0017,0018,0019,0100,010141
11ec,001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 158.0.1, firefox 157.0, firefox 157.0.1, +5 more.The fingerprint page shows the full measured match list. More on the catalog.20
11ec,001d,0017,0018,0019,02026
001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13, curl 8.7.1.The fingerprint page shows the full measured match list. More on the catalog.1

Cross-transport links

TLS ClientHello fingerprints observed from the same client via the beacon's correlation id on the other transport (e.g. this stack over TCP ↔ that stack over QUIC).

fingerprintlinked observations
q13d0315h3_55b375c5d22e_dc5437974b471