OAI-SearchBot

The wire fingerprints traffic claiming to be this crawler presented, split by whether a channel the operator publishes for verification — its IP ranges or forward-confirmed reverse DNS — confirmed the claim.

Claims in window

Same adjudication as the stats page: a claim confirmed by either channel the operator publishes — its IP ranges or forward-confirmed reverse DNS — is legit; one confirmed by neither is spoofed. Operators differ in which channels they offer, and either alone fully identifies. Sources count distinct clients, not traffic. Fingerprint windows below are day-granular, like sources.

observationssourceslegitspoofedspoof rate
11302031564723.2%

Fingerprints presented by confirmed traffic

The highest-volume fingerprints the operator's own traffic runs, per signal — claims confirmed via operator-published channels. A Match pill marks an exact match against a controlled capture — an association with known stacks, not an identity verdict: unrelated clients built on the same stack can legitimately share a fingerprint.

TLS ClientHello (JA4)

fingerprintobservations
t13d1011h2_61a7ad8aa9b6_3fcd1a44f3e3 Match?Exact match in Thumbprint's published controlled catalog captures: rust-reqwest 0.12.28.The fingerprint page shows the full measured match list. More on the catalog. 597
t13d1712h2_5b57614c22b0_ef7df7f74e48 176
t13d1713h2_5b57614c22b0_02c8e53ee398 42
t13d1712h2_5b57614c22b0_d5fe2c511efa 19

HTTP request (JA4H)

fingerprintobservations
ge20nr050000_a36a3d5685e0_000000000000_000000000000 363
ge20nn060000_ae91ff777030_000000000000_000000000000 237
ge20nn050000_a36a3d5685e0_000000000000_000000000000 234

HTTP/2 frames (Akamai)

fingerprintobservations
2:0;4:2097152;5:16384;6:16384|5177345|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: rust-reqwest 0.13.4, rust-reqwest 0.12.28, rust-reqwest 0.13.5, +3 more.The fingerprint page shows the full measured match list. More on the catalog. 597
2:0;1:4096;8:0;3:1024;4:1048576|25100289|0|a,p,m,s 237

TCP SYN (JA4T)

fingerprintobservations
65535_2-4-8-1-3_1390_12 597
64860_2-4-8-1-3_1368_9 237

TCP SYN (p0f)

fingerprintobservations
4:44+20:0:1390:65535,12:mss,sok,ts,nop,ws:df,id+:0 297
4:45+19:0:1390:65535,12:mss,sok,ts,nop,ws:df,id+:0 287
4:47+17:0:1368:64860,9:mss,sok,ts,nop,ws:df,id+:0 72
4:48+16:0:1368:64860,9:mss,sok,ts,nop,ws:df,id+:0 63
4:44+20:0:1368:64860,9:mss,sok,ts,nop,ws:df,id+:0 45
4:43+21:0:1368:64860,9:mss,sok,ts,nop,ws:df,id+:0 41
4:43+21:0:1390:65535,12:mss,sok,ts,nop,ws:df,id+:0 10
4:46+18:0:1368:64860,9:mss,sok,ts,nop,ws:df,id+:0 7
4:45+19:0:1368:64860,9:mss,sok,ts,nop,ws:df,id+:0 5
4:42+22:0:1368:64860,9:mss,sok,ts,nop,ws:df,id+:0 4

Fingerprints presented by unconfirmed claims

The impostor inventory: the highest-volume fingerprints wearing this operator's User-Agent that no operator-published channel confirms, per signal. A Match pill here shows known clients measured producing the same fingerprint an impostor presents.

TLS ClientHello (JA4)

fingerprintobservations
t13d131200_f57a46bbacb6_9249cab70c77 70
t13d131300_f57a46bbacb6_1bd98dace775 27
t13d1011h1_61a7ad8aa9b6_3a8073edd8ef 12
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. 6
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. 4
t13d1312h2_a44d0ee8b3cc_e381dae6da6b 2

HTTP request (JA4H)

fingerprintobservations
ge11nr05enus_f3bb7aa45ec4_000000000000_000000000000 68
ge11nn05enus_f3bb7aa45ec4_000000000000_000000000000 23
ge11nr040000_8b1ed2202073_000000000000_000000000000 6
ge11nn040000_8b1ed2202073_000000000000_000000000000 5
ge11nr030000_cd680697de12_000000000000_000000000000 4
ge11nr040000_e1d2031bdfea_000000000000_000000000000 3
ge20nn050000_857b5fa3405d_000000000000_000000000000 2
ge20nn130000_8613e10c8b61_000000000000_000000000000 2
ge11nn030000_cd680697de12_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: powershell 7.6.5, powershell 7.6.4, go-net/http 1.27.0, +7 more.The fingerprint page shows the full measured match list. More on the catalog. 1
ge11nr040000_db3cd719d965_000000000000_000000000000 1

HTTP/2 frames (Akamai)

fingerprintobservations
2:0;4:4194304;5:16384;6:262144;1:65536|1073741824|0|a,m,p,s 5
2:0;3:1;4:8388608;5:65536|8323073|0|m,s,a,p 2
2:0;4:4194304;5:16384;6:10485760|1073741824|0|a,m,p,s Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.8, go-net/http 1.26.7, +6 more.The fingerprint page shows the full measured match list. More on the catalog. 1

TCP SYN (JA4T)

fingerprintobservations
42600_2-4-8-1-3_1420_9 97
64240_2-4-8-1-3_1460_7 12
65320_2-4-8-1-3_1420_10 6
42340_2-4-8-1-3_1460_10 2
64620_2-4-8-1-3_1436_7 2
65535_2-4-8-1-3_1460_13 2

TCP SYN (p0f)

fingerprintobservations
4:58+6:0:1420:mss*30,9:mss,sok,ts,nop,ws:df,id+:0 93
4:58+6:0:1420:mss*46,10:mss,sok,ts,nop,ws:df,id+:0 6
4:48+16:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0 3
4:51+13:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0 3
4:47+17:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0 2
4:49+15:0:1420:mss*30,9:mss,sok,ts,nop,ws:df,id+:0 2
4:51+13:0:1420:mss*30,9:mss,sok,ts,nop,ws:df,id+:0 2
4:52+12:0:1460:mss*29,10:mss,sok,ts,nop,ws:df,id+:0 2
4:52+12:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0 2
4:53+11:0:1460:65535,13:mss,sok,ts,nop,ws:df,id+:0 2