TCP SYN (p0f)

4:110+18:0:1460:62727,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-26 04:28 · last seen 2026-10-26 02:31 · JSON

Last 7 days (1 observations)

Distinct clients per day (last 30 days, peak 2/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 TTL110+18
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
t13d1712h1_ab0a1bf427ad_8e6e362c5eac3
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
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
t13d3612h1_018971650b2c_e8b3fe21f08b1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn050000_be0d0b335e46_000000000000_0000000000003
ge11nn040000_66d37a417839_000000000000_0000000000001
ge11nr050000_9766b4b0354c_000000000000_0000000000001
he11nn040000_66d37a417839_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
62727_2-4-8-1-3_1460_76

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.157 Safari/537.363
RecordedFuture Global Inventory Crawler1
Python/3.11 aiohttp/3.14.11
Python/3.9 aiohttp/3.13.51

Country

fingerprintco-occurrences
DE · Germany4
US · United States1
IE · Ireland1

Network (ASN)

fingerprintco-occurrences
AS16509 · Amazon.com, Inc.5
AS14618 · Amazon.com, Inc.1

TLS supported groups

fingerprintco-occurrences
11ec,001d,0017,001e,0018,0019,0100,0101 Match?Exact match in Thumbprint's published controlled catalog captures: python-httpx 0.28.1, python-requests 2.34.2, curl 8.23.0, +4 more.The fingerprint page shows the full measured match list. More on the catalog.2
001d,0017,001e,0019,00181