TCP SYN (p0f)
4:47+17:0:1460:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df,ecn:0
first seen 2026-06-15 14:15 · last seen 2026-09-16 12:22 · JSON
Last 7 days (9 observations)
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 | 47+17 |
| Options length | 0 |
| MSS | 1460 |
| Window size | 65535 |
| Window scale | 6 |
| Options layout | mss,nop,ws,nop,nop,ts,sok,eol+1 |
| Quirks | df,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 |
|---|---|
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. | 9 |
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. | 7 |
t13d1517h2_8daaf6152771_cb7bf5808d99 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 152.0.7977.83, chrome 152.0.7977.64, chrome 152.0.7977.65, +5 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
t13d1812h1_85036bcba153_b26ce05bbdd6 | 2 |
t13d1516h3_8daaf6152771_d8a2da3f94cd | 2 |
t13d4907h2_0d8feac7bc37_7395dae3b2f3 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
t13d1712h1_ab0a1bf427ad_8e6e362c5eac | 1 |
t13d1713h1_ab0a1bf427ad_ecd0401ec68b Match?Exact match in Thumbprint's published controlled catalog captures: python-httpx 0.28.1.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
t13d4312h1_c7886603b240_b26ce05bbdd6 | 1 |
t13d3112h1_e8f1e7e78f70_b26ce05bbdd6 Match?Exact match in Thumbprint's published controlled catalog captures: php-guzzle 8.1.0, php-guzzle 8.0.2, php-guzzle 7.14.2, +6 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge20nr13engb_54728652be35_000000000000_000000000000 | 2 |
ge20nr09ensg_5ad46a65401a_000000000000_000000000000 | 2 |
ge20nr12it00_54b4638ab28b_000000000000_000000000000 | 2 |
ge11nn06enus_fb4afd1f380a_000000000000_000000000000 | 2 |
ge20nn11engb_3901d4197baf_000000000000_000000000000 | 2 |
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. | 2 |
ge20nr14engb_186438911b7e_000000000000_000000000000 | 1 |
ge20nr08engb_1945e0741196_000000000000_000000000000 | 1 |
ge11nn08enus_d971da0a91f1_000000000000_000000000000 | 1 |
ge20nr12enus_54b4638ab28b_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chrome 151.0.7922.137, edge 151.0.4129.93, +36 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
HTTP/2 frames (Akamai)
| fingerprint | co-occurrences |
|---|---|
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. | 8 |
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. | 6 |
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. | 5 |
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. | 2 |
2:0;4:2097152;3:100;9:1|10485760|0|m,s,p,a | 1 |
1:65536;4:131072;5:16384|12517377|3:0:0:201,5:0:0:101,7:0:0:1,9:0:7:1,11:0:3:1,13:0:0:241,15:0:13:42|m,p,a,s | 1 |
TCP SYN (JA4T)
| fingerprint | co-occurrences |
|---|---|
65535_2-1-3-1-1-8-4-0-0_1460_6 | 26 |
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
DE · Germany | 6 |
US · United States | 5 |
HK · Hong Kong SAR China | 4 |
AU · Australia | 3 |
SG · Singapore | 3 |
EE · Estonia | 3 |
GB · United Kingdom | 2 |
GR · Greece | 2 |
KZ · Kazakhstan | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS4616 · The Hong Kong Polytechnic University | 4 |
AS50324 · Campus, Hofnetz & Events GmbH | 4 |
AS61307 · AS STV | 3 |
AS4773 · MobileOne Ltd. Mobile/Internet Service Provider Singapore | 3 |
AS1221 · Telstra Limited | 3 |
AS22773 · Cox Communications Inc. | 2 |
AS5089 · Virgin Media Limited | 2 |
AS6799 · Ote SA (Hellenic Telecommunications Organisation) | 2 |
AS12611 · R-KOM Regensburger Telekommunikationsgesellschaft mbH | 2 |
AS9198 · JSC Kazakhtelecom | 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 |
|---|---|
q13d0311h3_55b375c5d22e_653d80c3fe9d | 3 |
q13d0311h3_55b375c5d22e_f2a83c8e78ae | 2 |
q13d0312h3_55b375c5d22e_178839b6cec1 | 1 |