Network (ASN)

AS51396

first seen 2026-06-19 21:07 · last seen 2026-10-29 23:34 · JSON

Last 7 days (3 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

Network namePfcloud UG
Domainpfcloud.io

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
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.29
t13d141000_cbb2034c60b8_e7c285222651 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.22.12.The fingerprint page shows the full measured match list. More on the catalog.6
t13d191000_9dc949149365_e7c2852226511
t13d101000_61a7ad8aa9b6_3ea2f44fd1af1
t13d3013h2_1d37bd780c83_8537cf56674e1
t13d3013h1_1d37bd780c83_ecd0401ec68b1
t13d1011h2_b5f355132441_9ced094328c91
t13d1110h2_10a2a44a4d44_5603904660151
t13d0711h2_92980b6017ae_9ced094328c91
t13d1314h1_f57a46bbacb6_fb48f8b98a291

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr040000_8391bea91fb6_000000000000_00000000000015
ge11nr050000_3658ef221638_000000000000_0000000000009
ge11nn050000_3658ef221638_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: wget 1.21.4, wget 1.25.0, wget 1.21.3.The fingerprint page shows the full measured match list. More on the catalog.5
ge11nr040000_9c3956fad5da_000000000000_0000000000004
ge20nn04enus_989c7cc05c9b_000000000000_0000000000003
ge11nn040000_88d30a62b7ad_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: wget 1.25.0.The fingerprint page shows the full measured match list. More on the catalog.2
ge11nr030000_0db47b7d240d_000000000000_0000000000001
ge11nn050000_fdb72fc7d4c1_000000000000_0000000000001
ge11nr06enus_a89d28968959_000000000000_0000000000001
ge20nn030000_bf75ddd0bb29_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:6291456;6:262144;4:1048576|15663105|1:0:0:256|m,a,s,p3
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, +8 more.The fingerprint page shows the full measured match list. More on the catalog.1

TCP SYN (p0f)

fingerprintco-occurrences
4:56+8:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:011
6:46+18:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:07
6:45+19:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:05
6:47+17:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:04
6:48+16:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:04
4:50+14:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:02
4:56+8:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:02
6:48+16:0:1440:mss*45,10:mss,sok,ts,nop,ws:flow:02
4:51+13:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:48+16:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1460_713
64800_2-4-8-1-3_1440_713
64800_2-4-8-1-3_1440_103
64240_2-4-8-1-3_1460_102
64240_2-4-8-1-3_1460_131
42340_2_1460_001

User-Agent

fingerprintco-occurrences
Go-http-client/1.117
Mozilla/5.0 (compatible; CT-WP-Scanner/1.0; +https://example.com/bot)9
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.366
Mozilla/5.0 (compatible; authorized-security-scan)3
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.8 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.361
curl/8.14.11
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.361
Mozilla/5.0 (compatible; research-scan/1.0)1

Country

fingerprintco-occurrences
NL · Netherlands39
SI · Slovenia3
DE · Germany1

TLS supported groups

fingerprintco-occurrences
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.3
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.2