TLS supported groups

11ec,001d,0017,0018,0019,0202

first seen 2026-10-17 22:55 · last seen 2026-10-30 23:51 · JSON

Last 7 days (12 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

Groups in wire order11ec (X25519MLKEM768), 001d (x25519), 0017 (secp256r1), 0018 (secp384r1), 0019 (secp521r1), 0202 (MLKEM1024)
Group count6
GREASE count0

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
t13d1517h2_8daaf6152771_6f4c3a25c80131
q13d0315h3_55b375c5d22e_bb76f32061e3 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 156.0, firefox 156.0.1.The fingerprint page shows the full measured match list. More on the catalog.8
t13d1516h2_8daaf6152771_14f25f0c9e967
t13d1515h2_8daaf6152771_93cf104bf5903
t13d1514h2_8daaf6152771_117163924e761

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr13enus_52a9a314672a_000000000000_00000000000022
ge30nr10enus_d6360b5be5ba_000000000000_0000000000004
ge20nr11enus_187a9385d229_000000000000_0000000000004
ge20nn10enus_b3034183f430_000000000000_0000000000004
ge20nr12enus_a72b71f519fc_000000000000_0000000000003
ge20nr13enus_016d87568c43_000000000000_0000000000003
ge20nn12enus_a72b71f519fc_000000000000_0000000000002
ge20nn11enus_187a9385d229_000000000000_0000000000002
ge30nr12enus_120f168c5544_000000000000_0000000000002
ge30nn11enus_7eaa533deebc_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:131072;5:16384|12517377|3:0:0:22|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 155.0.1, +31 more.The fingerprint page shows the full measured match list. More on the catalog.8
1:65536;2:0;4:131072;5:16384|12517377|3:0:0:42|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 154.0, firefox 152.0.5, firefox 152.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog.6
1:65536;2:0;4:131072;5:16384|12517377|11:0:0:42|m,p,a,s2
1:4096;2:0;4:32768;5:16384|12517377|3:0:0:22|m,p,a,s1
1:4096;2:0;4:32768;5:16384|12517377|3:0:0:42|m,p,a,s1
1:65536;2:0;4:131072;5:16384|12517377|9:0:0:42|m,p,a,s1
1:65536;2:0;4:131072;5:16384|12517377|5:0:0:22|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0.3, firefox 154.0, firefox 153.0, +12 more.The fingerprint page shows the full measured match list. More on the catalog.1
1:65536;2:0;4:131072;5:16384|12517377|7:0:0:22|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0.3, firefox 155.0, firefox 154.0, +3 more.The fingerprint page shows the full measured match list. More on the catalog.1
1:65536;2:0;4:131072;5:16384|12517377|17:0:0:42|m,p,a,s1
1:65536;2:0;4:131072;5:16384|12517377|13:0:0:42|m,p,a,s1

TCP SYN (p0f)

fingerprintco-occurrences
4:39+25:0:1380:mss*47,10:mss,sok,ts,nop,ws:df,id+:022
4:44+20:0:1412:mss*44,10:mss,sok,ts,nop,ws:df,id+:05
4:47+17:0:1420:mss*46,10:mss,sok,ts,nop,ws:df,id+:05
4:51+13:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:04
4:53+11:0:1380:mss*47,10:mss,sok,ts,nop,ws:df,id+:02
6:50+14:0:1440:65535,10:mss,sok,ts,nop,ws:ecn,flow:02
4:40+24:0:1380:mss*47,10:mss,sok,ts,nop,ws:df,id+:01
6:49+15:0:1440:65535,10:mss,sok,ts,nop,ws:ecn,flow:01

TCP SYN (JA4T)

fingerprintco-occurrences
64860_2-4-8-1-3_1380_1025
65320_2-4-8-1-3_1420_105
64240_2-4-8-1-3_1412_105
64240_2-4-8-1-3_1460_104
65535_2-4-8-1-3_1440_103

QUIC transport params

fingerprintco-occurrences
q13_c3e7031b10dc Match?Exact match in Thumbprint's published controlled catalog captures: firefox 155.0.1, firefox 156.0, firefox 155.0, +5 more.The fingerprint page shows the full measured match list. More on the catalog.8

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (X11; Linux x86_64; rv:158.0) Gecko/20100101 Firefox/158.035
Mozilla/5.0 (X11; Linux x86_64; rv:159.0) Gecko/20100101 Firefox/159.08
Mozilla/5.0 (Android 10; Mobile; rv:158.0) Gecko/158.0 Firefox/158.04
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:158.0) Gecko/20100101 Firefox/158.03

Country

fingerprintco-occurrences
PL · Poland26
UA · Ukraine8
NL · Netherlands7
IT · Italy5
US · United States4

Network (ASN)

fingerprintco-occurrences
AS16276 · OVH SAS26
AS34700 · MAXNET TELECOM, LTD8
AS12874 · Fastweb SpA5
AS11878 · tzulo, inc.4
AS43350 · NForce Entertainment B.V.4
AS64289 · Macarne.com3

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_bb76f32061e34
t13d1516h2_8daaf6152771_14f25f0c9e964
q13d0314h3_55b375c5d22e_29443802b1e41