TCP SYN (p0f)

4:111+17:0:1460:62727,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-05 09:08 · last seen 2026-10-26 01:06 · JSON

Last 7 days (7 observations)

Distinct clients per day (last 30 days, peak 4/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 version4
Initial TTL111+17
Options length0
MSS1460
Window size62727
Window scale7
Options layoutmss,sok,ts,nop,ws
Quirksdf,id+
Payload class0

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)

fingerprintco-occurrences
t13d450900_d524c25c267f_9da38b6fd1bc Match?Exact match in Thumbprint's published controlled catalog captures: java-urlconnection 1.8.0_492.The fingerprint page shows the full measured match list. More on the catalog.743
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.409
t13d131000_f57a46bbacb6_e7c285222651 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.23.12.The fingerprint page shows the full measured match list. More on the catalog.1
t13i130900_f57a46bbacb6_e7c2852226511
t13d1812h1_85036bcba153_d41ae481755e1
t13d361300_018971650b2c_7bc957b683631
t13d251100_b78ed14e2fd0_f50d94e863eb1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn040000_b47458f13025_000000000000_000000000000743
ge11nn080000_4e3e811ee70f_000000000000_000000000000340
ge11nn050000_be0d0b335e46_000000000000_00000000000070
ge11nr050000_9766b4b0354c_000000000000_0000000000002
ge11nn050000_9766b4b0354c_000000000000_0000000000001
ge11nn060000_a5151d48ea71_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
62727_2-4-8-1-3_1460_71157

User-Agent

fingerprintco-occurrences
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Amazonbot/0.1; +https://developer.amazon.com/support/amazonbot) Chrome/119.0.6045.214 Safari/537.36736
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; YouBot/1.0; +https://docs.you.com/youbot; env:prod) Chrome/142.0.0.0 Safari/537.36407
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_1) AppleWebKit/600.2.5 (KHTML, like Gecko) Version/8.0.2 Safari/600.2.5 (Gort)7
RecordedFuture Global Inventory Crawler3
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.362
facebookplatform/1.0 (+http://developers.facebook.com)1
Mozilla/5.0 (compatible; hn-worker/1.0)1

Country

fingerprintco-occurrences
US · United States1155
DE · Germany1
IN · India1

Network (ASN)

fingerprintco-occurrences
AS14618 · Amazon.com, Inc.1155
AS16509 · Amazon.com, Inc.2

TLS supported groups

fingerprintco-occurrences
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.7
001d,0017,001e,0019,0018,0100,0101,0102,0103,0104 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, php-guzzle 8.3.1, curl 7.88.1, +10 more.The fingerprint page shows the full measured match list. More on the catalog.1
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.1