Where can you find the binary structure of a X. 509 v3 certificate?

I read RFC 3280 (https://tools.ietf.org/html/rfc3280#section-4), but apparently missing something and can not correctly understand the structure of the certificate.
For RFC 4346 the wiki has a good article where it is clearly visible in all fields (https://en.wikipedia.org/wiki/Transport_Layer_Secu... not do the same for X. 509 v3 certificate?

I studied the output of WireShark, but for some reason it skips some of the bits in the certificate, apparently considering them too obvious and self-explanatory...

The issue has been resolved by the application program commands for working with X509 certificates from composition OpenSSL: openssl x509 -in certificate.der -inform der -text-noout
September 19th 19 at 00:32
1 answer
September 19th 19 at 00:34
https://www.openssl.org/docs/apps/asn1parse.html - this thing can give out the offsets, types, and field values. Maybe not to give a try.

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