TLS ClientHello (JA4)

t13i1909h1_9dc949149365_97f8aa674fd9

first seen 2026-06-12 22:56 · last seen 2026-10-30 16:10 · JSON

Last 7 days (8 observations)

Distinct clients per day (last 30 days, peak 7/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

Protocol	`t (TLS over TCP)`
TLS version	`13`
SNI	`i (no SNI / IP)`
Cipher count	`19`
Extension count	`9`
ALPN	`h1`
Ciphers	`000a, 002f, 0035, 009c, 009d, 1301, 1302, 1303, c009, c00a, c012, c013, c014, c02b, c02c, c02f, c030, cca8, cca9`
Extensions	`0005, 000a, 000b, 000d, 0012, 002b, 0033, ff01`
Signature algorithms	`0804, 0403, 0807, 0805, 0806, 0401, 0501, 0601, 0503, 0603, 0201, 0203`
JA4_r	`t13i1909h1_000a,002f,0035,009c,009d,1301,1302,1303,c009,c00a,c012,c013,c014,c02b,c02c,c02f,c030,cca8,cca9_0005,000a,000b,000d,0012,002b,0033,ff01_0804,0403,0807,0805,0806,0401,0501,0601,0503,0603,0201,0203`
JA4_o (sample)	`t13i1909h1_f2ce2cda000b_eb74760b2519`
JA4_ro (sample)	`t13i1909h1_cca8,cca9,c02f,c030,c02b,c02c,c013,c009,c014,c00a,009c,009d,002f,0035,c012,000a,1303,1301,1302_0005,000a,000b,000d,ff01,0010,0012,002b,0033_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)

fingerprint	co-occurrences
`ge11nr040000_e1d2031bdfea_000000000000_000000000000`	73
`ge11nr040000_88d30a62b7ad_000000000000_000000000000`	3
`ge11nn040000_88d30a62b7ad_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: wget 1.25.0.The fingerprint page shows the full measured match list. More on the catalog.	1

TCP SYN (p0f)

fingerprint	co-occurrences
`4:47+17:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	18
`4:58+6:0:1420:65535,12:mss,nop,ws:df,id+:0`	13
`4:49+15:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	9
`4:55+9:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	6
`4:52+12:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	5
`4:46+18:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	5
`4:51+13:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	4
`4:45+19:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	4
`4:54+10:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	4
`4:50+14:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	3

TCP SYN (JA4T)

fingerprint	co-occurrences
`64240_2-4-8-1-3_1460_7`	58
`65535_2-1-3_1420_12`	13
`64240_2-4-8-1-3_1460_9`	2

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (compatible; GenomeCrawlerd/1.0; +https://www.nokia.com/genomecrawler)`	44
`Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.6312.86 Safari/537.36`	31
`Mozilla/5.0 (compatible; zgrab/2)`	2

Country

fingerprint	co-occurrences
`US` · United States	33
`FR` · France	31
`NL` · Netherlands	11
`DE` · Germany	2

Network (ASN)

fingerprint	co-occurrences
`AS12876` · Scaleway SAS	31
`AS21859` · Zenlayer Inc	23
`AS396982` · Google LLC	13
`AS211680` · NSEC - Sistemas Informaticos, S.A.	8
`AS21100` · ROUTE 95 LLC	2

TLS supported groups

fingerprint	co-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.	9
`11ec,001d,0017,0018,0019` Match?Exact match in Thumbprint's published controlled catalog captures: firefox 157.0.1, firefox-esr 153.5.1esr, firefox 158.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog.	7