TLS ClientHello (JA4)

t13d1713h1_ab0a1bf427ad_ecd0401ec68b

first seen 2026-06-12 07:35 · last seen 2026-11-01 21:02 · JSON

Last 7 days (4238 observations)

Distinct clients per day (last 30 days, peak 130/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	`d (domain)`
Cipher count	`17`
Extension count	`13`
ALPN	`h1`
Ciphers	`0067, 006b, 009e, 009f, 1301, 1302, 1303, c023, c024, c027, c028, c02b, c02c, c02f, c030, cca8, cca9`
Extensions	`000a, 000b, 000d, 0016, 0017, 001b, 0023, 002b, 002d, 0033, ff01`
Signature algorithms	`0905, 0906, 0904, 0403, 0503, 0603, 0807, 0808, 081a, 081b, 081c, 0809, 080a, 080b, 0804, 0805, 0806, 0401, 0501, 0601, 0303, 0301, 0302, 0402, 0502, 0602`
JA4_r	`t13d1713h1_0067,006b,009e,009f,1301,1302,1303,c023,c024,c027,c028,c02b,c02c,c02f,c030,cca8,cca9_000a,000b,000d,0016,0017,001b,0023,002b,002d,0033,ff01_0905,0906,0904,0403,0503,0603,0807,0808,081a,081b,081c,0809,080a,080b,0804,0805,0806,0401,0501,0601,0303,0301,0302,0402,0502,0602`
JA4_o (sample)	`t13d1713h1_fd0eb050439a_757460b24059`
JA4_ro (sample)	`t13d1713h1_1302,1303,1301,c02c,c030,c02b,c02f,cca9,cca8,c024,c028,c023,c027,009f,009e,006b,0067_ff01,0000,000b,000a,0023,0010,0016,0017,000d,002b,002d,0033,001b_0905,0906,0904,0403,0503,0603,0807,0808,081a,081b,081c,0809,080a,080b,0804,0805,0806,0401,0501,0601,0303,0301,0302,0402,0502,0602`

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
`ge11nn080000_4e3e811ee70f_000000000000_000000000000`	11961
`ge11nn050000_be0d0b335e46_000000000000_000000000000`	1556
`ge11nn040000_e1d2031bdfea_000000000000_000000000000`	746
`ge11nn05enus_f3bb7aa45ec4_000000000000_000000000000`	253
`ge11nn11enus_f52f937d55db_000000000000_000000000000`	9
`ge11nn06enus_7eb5f6c8ec48_000000000000_000000000000`	9
`ge11nn040000_50034e570378_000000000000_000000000000`	9
`ge11nn08enus_8d2381d4363a_000000000000_000000000000`	8
`ge11nn040000_177aea7101ae_000000000000_000000000000`	8
`he11nn040000_66d37a417839_000000000000_000000000000`	6

HTTP/2 frames (Akamai)

fingerprint	co-occurrences
`1:4096;2:0;4:65535;5:16384;3:100;6:65536\|16777216\|0\|m,a,s,p` Match?Exact match in Thumbprint's published controlled catalog captures: python-httpx 0.28.1.The fingerprint page shows the full measured match list. More on the catalog.	4

TCP SYN (p0f)

fingerprint	co-occurrences
`4:116+12:0:1460:62727,7:mss,sok,ts,nop,ws:df,id+:0`	6460
`4:119+9:0:1460:62727,7:mss,sok,ts,nop,ws:df,id+:0`	3563
`4:112+16:0:1460:62727,7:mss,sok,ts,nop,ws:df,id+:0`	2435
`4:57+7:0:1420:mss*30,7:mss,sok,ts,nop,ws:df,id+:0`	741
`4:115+13:0:1460:62727,7:mss,sok,ts,nop,ws:df,id+:0`	605
`4:111+17:0:1460:62727,7:mss,sok,ts,nop,ws:df,id+:0`	409
`4:55+9:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	88
`4:57+7:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	51
`4:56+8:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	26
`4:49+15:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	25

TCP SYN (JA4T)

fingerprint	co-occurrences
`62727_2-4-8-1-3_1460_7`	13478
`42600_2-4-8-1-3_1420_7`	741
`64240_2-4-8-1-3_1460_7`	271
`64860_2-4-8-1-3_1380_7`	9
`24704_2-4-8-1-3_1240_7`	9
`65320_2-4-8-1-3_1420_7`	8
`28288_2-4-8-1-3_1420_7`	8
`35640_2-4-8-1-3_8910_9`	5
`64240_2-4-8-1-3_1436_7`	4
`35640_2-4-8-1-3_1460_9`	4

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; YouBot/1.0; +https://docs.you.com/youbot; env:prod) Chrome/142.0.0.0 Safari/537.36`	13428
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36`	741
`Mozilla/5.0 (compatible; ElevenlabsCrawler/1.0; +https://elevenlabs.io/docs/bots)`	251
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.36`	49
`Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Claude-User/1.0; +claude-user@anthropic.com)`	25
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36 Edg/114.0.1823.43`	10
`Mozilla/5.0 (iPhone; CPU iPhone OS 17_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.0 Mobile/15E148 Safari/604.1`	10
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0 Safari/537.36`	10
`Mozilla/5.0 (X11; Linux i686; rv:109.0) Gecko/20100101 Firefox/120.0`	8
`nameserver-checker-http-validator/1.0`	4

Country

fingerprint	co-occurrences
`US` · United States	14534
`DE` · Germany	10
`BR` · Brazil	7
`FI` · Finland	4
`NL` · Netherlands	3
`JP` · Japan	3
`ID` · Indonesia	3
`SG` · Singapore	2
`GB` · United Kingdom	2
`MX` · Mexico	2

Network (ASN)

fingerprint	co-occurrences
`AS14618` · Amazon.com, Inc.	13477
`AS396982` · Google LLC	770
`AS30058` · FDCservers.net	70
`AS46635` · AviationAI	59
`AS62874` · Web2Objects LLC	21
`AS10557` · Connect Northwest Internet Services, LLC	19
`AS11798` · Ace Data Centers, Inc.	18
`AS9009` · M247 Europe SRL	17
`AS396356` · Latitude.sh	15
`AS64249` · Charles River Operation	12

TLS supported groups

fingerprint	co-occurrences
`11ec,001d,0017,001e,0018,0019,0100,0101` Match?Exact match in Thumbprint's published controlled catalog captures: python-httpx 0.28.1, python-requests 2.34.2, curl 8.23.0, +4 more.The fingerprint page shows the full measured match list. More on the catalog.	5684