Network (ASN)

AS12816

first seen 2026-06-16 13:30 · last seen 2026-10-30 17:41 · JSON

Last 7 days (3 observations)

Distinct clients per day (last 30 days, peak 3/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

Network nameLeibniz-Rechenzentrum
Domainlrz.de

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
q13d0311h3_55b375c5d22e_df5b9e59796839
t13d191100_9dc949149365_be53661681a436
t13d171100_ab0a1bf427ad_8e6e362c5eac4

HTTP request (JA4H)

fingerprintco-occurrences
he30nn020000_5594a17e7e7e_000000000000_00000000000036
ge11nn020000_818f42cc3fd7_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: php-guzzle 8.2.0, php-guzzle 8.1.0, php-guzzle 8.0.2, +13 more.The fingerprint page shows the full measured match list. More on the catalog.34
ge11nn050000_ea6f06182064_000000000000_0000000000004
he30nn030000_042112399351_000000000000_0000000000003
ge11nn020000_3ed38b250d3d_000000000000_0000000000002

TCP SYN (p0f)

fingerprintco-occurrences
4:47+17:0:1460:mss*44,7:mss,nop,nop,sok,nop,ws:df,id+:011
6:47+17:0:1440:mss*45,7:mss,nop,nop,sok,nop,ws:flow:07
4:46+18:0:1460:mss*44,7:mss,nop,nop,sok,nop,ws:df,id+:07
6:46+18:0:1440:mss*45,7:mss,nop,nop,sok,nop,ws:flow:05
6:44+20:0:1440:mss*45,7:mss,nop,nop,sok,nop,ws:flow:03
6:47+17:0:1260:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:ecn,flow:02
6:43+21:0:1440:mss*45,7:mss,nop,nop,sok,nop,ws:flow:02
4:41+23:0:1250:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df:02
6:45+19:0:1440:mss*45,7:mss,nop,nop,sok,nop,ws:flow:01

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-1-1-4-1-3_1460_717
64800_2-1-1-4-1-3_1440_717
65535_2-1-3-1-1-8-4-0-0_1250_62
65535_2-1-3-1-1-8-4-0-0_1260_62

QUIC transport params

fingerprintco-occurrences
q12_67a81e69c99237
q13_dd847bf908082

User-Agent

fingerprintco-occurrences
quic-go-HTTP/339
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.5060.134 Safari/537.3636
cf-defaults-research/0.1 (academic research; fetches robots.txt and homepage once)4

Country

fingerprintco-occurrences
DE · Germany79

TLS supported groups

fingerprintco-occurrences
001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13.The fingerprint page shows the full measured match list. More on the catalog.9
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.4