TCP SYN (p0f)
4:108+20:0:1440:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:0
first seen 2026-07-03 21:50 · last seen 2026-08-28 05:33 · JSON
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 | 108+20 |
| Options length | 0 |
| MSS | 1440 |
| Window size | mss*44 |
| Window scale | 8 |
| Options layout | mss,nop,ws,nop,nop,sok |
| Quirks | df,id+,ecn |
| 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. | 2 |
t13d2212h2_231e334592e8_36bf25f296df | 1 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge11nr030000_cd680697de12_000000000000_000000000000 | 1 |
ge11nr040000_bfb2fc23090b_000000000000_000000000000 | 1 |
ge20nn040000_272467e735d1_000000000000_000000000000 | 1 |
HTTP/2 frames (Akamai)
| fingerprint | co-occurrences |
|---|---|
2:0;4:65535|67043329|0|m,s,a,p | 1 |
TCP SYN (JA4T)
| fingerprint | co-occurrences |
|---|---|
64240_2-1-3-1-1-4_1440_8 | 3 |
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
US · United States | 3 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS8075 · Microsoft Corporation | 3 |