TLS ClientHello (JA4)

t13d131100_f57a46bbacb6_a089bac06eae

first seen 2026-09-05 06:14 · last seen 2026-10-30 09:35 · 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

Protocolt (TLS over TCP)
TLS version13
SNId (domain)
Cipher count13
Extension count11
ALPN00
Ciphers1301, 1302, 1303, c009, c00a, c013, c014, c02b, c02c, c02f, c030, cca8, cca9
Extensions0005, 000a, 000b, 000d, 0012, 0017, 002b, 0032, 0033, ff01
Signature algorithms0904, 0905, 0906, 0804, 0403, 0807, 0805, 0806, 0401, 0501, 0601, 0503, 0603, 0201, 0203
JA4_rt13d131100_1301,1302,1303,c009,c00a,c013,c014,c02b,c02c,c02f,c030,cca8,cca9_0005,000a,000b,000d,0012,0017,002b,0032,0033,ff01_0904,0905,0906,0804,0403,0807,0805,0806,0401,0501,0601,0503,0603,0201,0203
JA4_o (sample)t13d131100_45672f90a73c_ec51838167ee
JA4_ro (sample)t13d131100_c02b,c02f,c02c,c030,cca9,cca8,c009,c013,c00a,c014,1301,1302,1303_0000,000b,ff01,0017,0012,0005,000a,000d,0032,002b,0033_0904,0905,0906,0804,0403,0807,0805,0806,0401,0501,0601,0503,0603,0201,0203

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.

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr030000_cd680697de12_000000000000_0000000000007
ge11nn13engb_907d1f6f88cf_000000000000_0000000000005
ge11nn13dede_907d1f6f88cf_000000000000_0000000000004
ge11nr13dede_907d1f6f88cf_000000000000_0000000000003
ge11nn13enus_907d1f6f88cf_000000000000_0000000000003
ge11nr040000_e1d2031bdfea_000000000000_0000000000002
ge11nn040000_8391bea91fb6_000000000000_0000000000001
ge11nr13enus_907d1f6f88cf_000000000000_0000000000001

TCP SYN (p0f)

fingerprintco-occurrences
4:54+10:0:1460:mss*29,9:mss,sok,ts,nop,ws:df,id+:08
4:55+9:0:1460:mss*29,9:mss,sok,ts,nop,ws:df,id+:04
4:47+17:0:1400:mss*44,7:mss,sok,ts,nop,ws:df,id+:04
4:55+9:0:1460:mss*29,12:mss,sok,ts,nop,ws:df,id+:04
4:51+13:0:1460:mss*29,9:mss,sok,ts,nop,ws:df,id+:02
4:48+16:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:02
4:51+13:0:1460:mss*29,12:mss,sok,ts,nop,ws:df,id+:01
4:50+14:0:1452:mss*22,7:mss,sok,ts,nop,ws:df,id+:01

TCP SYN (JA4T)

fingerprintco-occurrences
42340_2-4-8-1-3_1460_914
42340_2-4-8-1-3_1460_125
64240_2-4-8-1-3_1400_74
64240_2-4-8-1-3_1460_72
32120_2-4-8-1-3_1452_71

User-Agent

fingerprintco-occurrences
Go-http-client/1.15
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.365
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.364
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36 Edg/126.0.0.04
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.5 Safari/605.1.153
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36 OPR/111.0.0.03
Mozilla/5.0 (iPhone; CPU iPhone OS 17_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.5 Mobile/15E148 Safari/604.11
Mozilla/5.0 gitscan-go/0.31

Country

fingerprintco-occurrences
US · United States16
NL · Netherlands5
CH · Switzerland4
UA · Ukraine1

Network (ASN)

fingerprintco-occurrences
AS142430 · DIGI VPS16
AS402253 · SKN Subnet & Telecom Ltd4
AS48090 · TECHOFF SRV LIMITED3
AS197170 · TechTies Inc.2
AS49824 · PC "Astra-net"1

TLS supported groups

fingerprintco-occurrences
001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13.The fingerprint page shows the full measured match list. More on the catalog.2