JA4 t12d490700_ed211f7843e6_b84f7053a7d6

t12d490700_ed211f7843e6_b84f7053a7d6

Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.

What this fingerprint encodes

Transport

TCP

TLS version

TLS 1.2

Server name

server name sent

Cipher suites offered

49

Extensions offered

7

ALPN

none offered

Same tool, different options

These 4 other fingerprints share this one's JA4_c — the extension and signature-algorithm hash. A client that keeps its extension set constant while varying its cipher list produces exactly this pattern, which is what a scanner iterating cipher suites looks like. A JA3 cannot show you this: its single MD5 collapses ciphers and extensions together, so every variation looks like an unrelated client.

• t12d560700_8aab05645947_b84f7053a7d6
• t12d610700_8a10cb45a794_b84f7053a7d6
• t12d650700_0dd215169a35_b84f7053a7d6
• t12d860700_e18388e7f3a3_b84f7053a7d6

The hello it was computed from

Recovered because the proxy now stores the pre-hash JA3 string alongside the digest. Every number below came out of this client's ClientHello; anything we cannot name in the IANA registry is shown as its raw value rather than guessed at.

Version

TLS 1.2

Cipher suites 49

• TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
• TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
• TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
• TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
• TLS_DHE_RSA_WITH_AES_128_GCM_SHA256
• 162 (0x00a2)
• 163 (0x00a3)
• TLS_DHE_RSA_WITH_AES_256_GCM_SHA384
• TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
• TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
• TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
• TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
• TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
• TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384
• TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
• TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
• TLS_DHE_RSA_WITH_AES_128_CBC_SHA256
• TLS_DHE_RSA_WITH_AES_128_CBC_SHA
• 64 (0x0040)
• TLS_DHE_RSA_WITH_AES_256_CBC_SHA256
• 56 (0x0038)
• TLS_DHE_RSA_WITH_AES_256_CBC_SHA
• TLS_RSA_WITH_AES_128_GCM_SHA256
• TLS_RSA_WITH_AES_256_GCM_SHA384
• 50 (0x0032)
• 49201 (0xc031)
• 49197 (0xc02d)
• 49193 (0xc029)
• 49189 (0xc025)
• 49166 (0xc00e)
• 49156 (0xc004)
• TLS_RSA_WITH_AES_128_CBC_SHA256
• TLS_RSA_WITH_AES_128_CBC_SHA
• 106 (0x006a)
• 49202 (0xc032)
• 49198 (0xc02e)
• 49194 (0xc02a)
• 49190 (0xc026)
• 49167 (0xc00f)
• 49157 (0xc005)
• TLS_RSA_WITH_AES_256_CBC_SHA256
• TLS_RSA_WITH_AES_256_CBC_SHA
• TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA
• 135 (0x0087)
• TLS_RSA_WITH_CAMELLIA_256_CBC_SHA
• TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA
• 68 (0x0044)
• TLS_RSA_WITH_CAMELLIA_128_CBC_SHA
• TLS_EMPTY_RENEGOTIATION_INFO_SCSV

Extensions 7

• server_name
• ec_point_formats
• supported_groups
• session_ticket
• signature_algorithms
• heartbeat
• padding

Named groups 25

• 14 (0x000e)
• 13 (0x000d)
• secp521r1
• 11 (0x000b)
• 12 (0x000c)
• secp384r1
• 9 (0x0009)
• 10 (0x000a)
• 22 (0x0016)
• secp256r1
• 8 (0x0008)
• 6 (0x0006)
• 7 (0x0007)
• 20 (0x0014)
• 21 (0x0015)
• 4 (0x0004)
• 5 (0x0005)
• 18 (0x0012)
• 19 (0x0013)
• 1 (0x0001)
• 2 (0x0002)
• 3 (0x0003)
• 15 (0x000f)
• 16 (0x0010)
• 17 (0x0011)

Point formats 3

• uncompressed
• ansiX962_compressed_prime
• ansiX962_compressed_char2

771,49199-49195-49200-49196-158-162-163-159-49191-49187-49171-49161-49192-49188-49172-49162-103-51-64-107-56-57-156-157-50-49201-49197-49193-49189-49166-49156-60-47-106-49202-49198-49194-49190-49167-49157-61-53-136-135-132-69-68-65-255,0-11-10-35-13-15-21,14-13-25-11-12-24-9-10-22-23-8-6-7-20-21-4-5-18-19-1-2-3-15-16-17,0-1-2

Seen in live traffic

Connections

1

First seen

2026-09-09 16:52 UTC

Last seen

2026-09-09 16:52 UTC

Transport

TCP

This entry is an observation, not a policy decision. It is here because the edge saw it, not because anyone reviewed it, and it blocks nothing on its own. Only the curated tier drives classification and banning.