TCP SYN (p0f)
4:41+23:0:1160:65535,9:mss,sok,nop,nop,nop,nop,nop,nop,nop,nop,nop,nop,nop,ws::0
first seen 2026-09-01 07:54 · last seen 2026-10-28 03:59 · JSON
Last 7 days (1 observations)
Distinct clients per day (last 30 days, peak 1/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
| IP version | 4 |
|---|---|
| Initial TTL | 41+23 |
| Options length | 0 |
| MSS | 1160 |
| Window size | 65535 |
| Window scale | 9 |
| Options layout | mss,sok,nop,nop,nop,nop,nop,nop,nop,nop,nop,nop,nop,ws |
| Payload class | 0 |
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)
| fingerprint | co-occurrences |
|---|---|
t13d131100_f57a46bbacb6_ab7e3b40a677 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.5, go-net/http 1.26.4.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
t13d1515h1_8daaf6152771_de4a06bb82e3 | 1 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge11nn13enus_9db22d02e17a_000000000000_000000000000 | 1 |
ge11nr17zhtw_021c223ca66c_000000000000_000000000000 | 1 |
TCP SYN (JA4T)
| fingerprint | co-occurrences |
|---|---|
65535_2-4-1-1-1-1-1-1-1-1-1-1-1-3_1160_9 | 2 |
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
BD · Bangladesh | 2 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS24389 · GrameenPhone Ltd. | 2 |
TLS supported groups
| fingerprint | co-occurrences |
|---|---|
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. | 1 |