TCP SYN (p0f)
6:41+23:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:0
first seen 2026-06-26 03:34 · last seen 2026-08-25 12:21 · 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 | 6 |
|---|---|
| Initial TTL | 41+23 |
| Options length | 0 |
| MSS | 1440 |
| Window size | mss*45 |
| Window scale | 7 |
| Options layout | mss,sok,ts,nop,ws |
| 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 |
|---|---|
t13d301000_1d37bd780c83_3550537cd59b | 1061 |
t12d290700_fc2078a0b8c0_8c06664c3ac5 | 9 |
t13d521100_b262b3658495_8e6e362c5eac | 6 |
t13d1516h2_8daaf6152771_d8a2da3f94cd Match?Exact match in Thumbprint's published controlled catalog captures: chromium 149.0.7827.102, chrome 149.0.7827.102, chrome 149.0.7827.156, +25 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
t13d2013h2_a09f3c656075_7f0f34a4126d Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, safari 26.4, safari 26.6.2, +2 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
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 |
t13d3112h2_e8f1e7e78f70_b26ce05bbdd6 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.5.0, php-curl 7.88.1.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
t13d251100_b78ed14e2fd0_ab7e3b40a677 | 1 |
t13d3113h2_e8f1e7e78f70_ce5650b735ce | 1 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge11nr08enus_002f1ef91713_000000000000_000000000000 | 1061 |
ge11nn050000_2469c960a647_000000000000_000000000000 | 5 |
ge11nn040000_bfa5a9b89dd6_000000000000_000000000000 | 4 |
ge11nn030000_dd98166e0881_000000000000_000000000000 | 2 |
ge11nn05en00_61812dc1cc58_000000000000_000000000000 | 2 |
ge11nr030000_0db47b7d240d_000000000000_000000000000 | 1 |
ge11nn040000_d368c19b6155_000000000000_000000000000 | 1 |
ge20nn020000_5594a17e7e7e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0, curl 8.18.0, +9 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
ge11nn030000_b0d6a43aa599_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: powershell 5.1.26100.33296, powershell 5.1.26100.33158, powershell 5.1.26100.32995.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
ge11nr050000_57c5e92682a8_000000000000_000000000000 | 1 |
HTTP/2 frames (Akamai)
| fingerprint | co-occurrences |
|---|---|
2:0;3:100;4:2097152;9:1|10420225|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, safari 26.5, safari 26.4, +2 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
3:100;4:10485760;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
1:65536;2:0;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 151.0.7922.34, chrome 151.0.7922.137, +42 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
1:65536;2:0;4:6291456;6:262144|15663105|1:1:0:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chromium 149.0.7827.102, chrome 149.0.7827.102, +58 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
3:100;4:1073741824;2:0|1073676289|0|m,p,s,a | 1 |
TCP SYN (JA4T)
| fingerprint | co-occurrences |
|---|---|
64800_2-4-8-1-3_1440_7 | 1082 |
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
FR · France | 1069 |
PL · Poland | 5 |
IN · India | 5 |
RO · Romania | 2 |
DE · Germany | 1 |
FI · Finland | 1 |
KZ · Kazakhstan | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS51167 · Contabo GmbH | 1065 |
AS16276 · OVH SAS | 10 |
AS47583 · Hostinger International Limited | 5 |
AS36183 · Akamai Technologies, Inc. | 2 |
AS24940 · Hetzner Online GmbH | 1 |
AS48716 · PS Internet Company LLP | 1 |