TCP SYN (p0f)
4:52+12:0:1460:62720,7:mss,sok,ts,nop,ws:df,id+:0
first seen 2026-09-23 18:11 · last seen 2026-10-27 02:24 · JSON
Last 7 days (51 observations)
Distinct clients per day (last 30 days, peak 9/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 | 52+12 |
| Options length | 0 |
| MSS | 1460 |
| Window size | 62720 |
| Window scale | 7 |
| Options layout | mss,sok,ts,nop,ws |
| Quirks | df,id+ |
| 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 |
|---|---|
t13d1314h2_f57a46bbacb6_fb48f8b98a29 | 51 |
t13d3013h2_1d37bd780c83_8537cf56674e | 9 |
t13d4312h1_c7886603b240_b26ce05bbdd6 | 1 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge20nn030000_bf75ddd0bb29_000000000000_000000000000 | 9 |
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 |
ge20nr020000_fb4f949fd323_000000000000_000000000000 | 1 |
he20nr06enus_8955ea8069c0_000000000000_000000000000 | 1 |
he20nr04en00_4fcaafa6af53_000000000000_000000000000 | 1 |
ge20nr06enus_16ed9fb13497_000000000000_000000000000 | 1 |
he20nr06eses_d21523c84070_000000000000_000000000000 | 1 |
he20nr05jajp_79a2d0841912_000000000000_000000000000 | 1 |
he20nr05eses_60dfe39b81ff_000000000000_000000000000 | 1 |
he20nr05zhcn_c6cb44bbbdf1_000000000000_000000000000 | 1 |
HTTP/2 frames (Akamai)
| fingerprint | co-occurrences |
|---|---|
2:0;4:4194304;5:16384;6:10485760|1073741824|0|a,m,p,s Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.10, go-net/http 1.26.9, +8 more.The fingerprint page shows the full measured match list. More on the catalog. | 51 |
3:100;4:65536;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, curl 8.18.0, curl 8.21.0, +8 more.The fingerprint page shows the full measured match list. More on the catalog. | 9 |
TCP SYN (JA4T)
| fingerprint | co-occurrences |
|---|---|
62720_2-4-8-1-3_1460_7 | 61 |
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
FR · France | 54 |
DE · Germany | 3 |
ES · Spain | 2 |
GB · United Kingdom | 1 |
SE · Sweden | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS31898 · Oracle Corporation | 61 |
TLS supported groups
| fingerprint | co-occurrences |
|---|---|
11ec,11eb,11ed,001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.27.3, go-net/http 1.26.10.The fingerprint page shows the full measured match list. More on the catalog. | 51 |
11ec,001d,0017,001e,0018,0019,0100,0101 Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 24.22.1, python-httpx 0.28.1, python-requests 2.34.2, +2 more.The fingerprint page shows the full measured match list. More on the catalog. | 9 |