TCP SYN (p0f)
6:236+19:0:1312:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:flow:0
first seen 2026-08-22 13:58 · last seen 2026-08-22 15:06 · JSON
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
| IP version | 6 |
|---|---|
| Initial TTL | 236+19 |
| Options length | 0 |
| MSS | 1312 |
| Window size | 65535 |
| Window scale | 6 |
| Options layout | mss,nop,ws,nop,nop,ts,sok,eol+1 |
| Quirks | flow |
| 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 |
|---|---|
t13d1011h2_61a7ad8aa9b6_3fcd1a44f3e3 Match?Exact match in Thumbprint's published controlled catalog captures: rust-reqwest 0.12.28.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
t13d1812h1_85036bcba153_b26ce05bbdd6 | 1 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge20nn04enus_39a3ba4480e8_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: urlsession 6.1.2.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
ge11nn050000_b223a0ebb0b5_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: python-requests 2.34.2, python-requests 2.33.1, python-requests 2.32.3.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
HTTP/2 frames (Akamai)
| fingerprint | co-occurrences |
|---|---|
2:0;4:2097152;5:16384;6:16384|5177345|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: rust-reqwest 0.13.4, rust-reqwest 0.12.28, rust-reqwest 0.13.5, +3 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
TCP SYN (JA4T)
| fingerprint | co-occurrences |
|---|---|
65535_2-1-3-1-1-8-4-0-0_1312_6 | 3 |
User-Agent
| fingerprint | co-occurrences |
|---|---|
Mozilla/5.0 (compatible; grok-agent/1.0; +https://x.ai) | 2 |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0 Safari/537.36 | 1 |
Country
| fingerprint | co-occurrences |
|---|---|
HU · Hungary | 3 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS213155 · Yettel Hungary Ltd. | 3 |