TCP SYN (p0f)
4:46+18:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:0
first seen 2026-06-10 23:55 · last seen 2026-09-04 02:28 · 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 | 46+18 |
| Options length | 0 |
| MSS | 1460 |
| Window size | mss*44 |
| Window scale | 10 |
| 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 |
|---|---|
t13d4113h2_8ae0994cad11_86f67be995ff | 23 |
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. | 17 |
t13d1714h2_5b57614c22b0_53a6d0ab1c42 | 3 |
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. | 3 |
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 |
t13d181000_5d04281c6031_78e6aca7449b | 2 |
t13d4113h1_8ae0994cad11_86f67be995ff | 1 |
t13d1615h2_86a278354501_a54fffd0eb61 | 1 |
t13d411200_8ae0994cad11_504258d8eccf | 1 |
t13d1715h2_5b57614c22b0_a54fffd0eb61 | 1 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge20nn030000_042112399351_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0.The fingerprint page shows the full measured match list. More on the catalog. | 20 |
ge20nr13engb_54728652be35_000000000000_000000000000 | 14 |
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. | 3 |
ge20nr11enus_187a9385d229_000000000000_000000000000 | 2 |
ge20nn14engb_186438911b7e_000000000000_000000000000 | 2 |
ge20nr12enus_a4e537ffe33a_000000000000_000000000000 | 2 |
ge11nr030000_cd680697de12_000000000000_000000000000 | 2 |
ge11nn050000_2469c960a647_000000000000_000000000000 | 2 |
ge11nn030000_042112399351_000000000000_000000000000 | 1 |
po20nn050000_9a13ab48ac23_000000000000_000000000000 | 1 |
HTTP/2 frames (Akamai)
| fingerprint | co-occurrences |
|---|---|
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, +7 more.The fingerprint page shows the full measured match list. More on the catalog. | 23 |
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, +59 more.The fingerprint page shows the full measured match list. More on the catalog. | 14 |
1:65536;2:0;4:131072;5:16384|12517377|3:0:0:22|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 154.0, +25 more.The fingerprint page shows the full measured match list. More on the catalog. | 5 |
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, +43 more.The fingerprint page shows the full measured match list. More on the catalog. | 3 |
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. | 3 |
1:65536;2:0;4:131072;5:16384|12517377|3:0:0:42|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 154.0, firefox 152.0.5, firefox 152.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
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 1.26.8, go-net/http 1.26.7, +6 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
TCP SYN (JA4T)
| fingerprint | co-occurrences |
|---|---|
64240_2-4-8-1-3_1460_10 | 13 |
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
AU · Australia | 45 |
US · United States | 7 |
IE · Ireland | 2 |
TH · Thailand | 2 |
FR · France | 1 |
RO · Romania | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS38195 · Superloop | 45 |
AS11351 · Charter Communications Inc | 5 |
AS5466 · Eircom Limited | 2 |
AS45102 · Alibaba (US) Technology Co., Ltd. | 2 |
AS16276 · OVH SAS | 1 |
AS10796 · Charter Communications Inc | 1 |
AS2200 · Renater | 1 |
AS9009 · M247 Europe SRL | 1 |
Cross-transport links
TLS ClientHello fingerprints observed from the same client via the beacon's correlation id on the other transport (e.g. this stack over TCP ↔ that stack over QUIC).
| fingerprint | linked observations |
|---|---|
q13d0312h3_55b375c5d22e_5a06198afb93 | 12 |
q13d0311h3_55b375c5d22e_653d80c3fe9d | 2 |
q13d0315h3_55b375c5d22e_dc5437974b47 | 2 |
q13d0313h3_55b375c5d22e_fc7519ff7bc2 | 2 |