OID value: 1.3.27
OID description:
There's a whole range of OIDs for ICAO that are missing
For example, in the EUR AMHS Manual, version 10, Appendix G, there's this definition:
id-oc OBJECT IDENTIFIER ::=
{ iso(1) identified-organisation(3) icao(27) atn-directory(7) oc 0 }
id-at OBJECT IDENTIFIER ::=
{ iso(1) identified-organisation(3) icao(27) atn-directory(7) at 1 }
id-nf OBJECT IDENTIFIER ::=
{ iso(1) identified-organisation(3) icao(27) atn-directory(7) nf 2 }
URL for further info: http://www.icao.int/EURNAT/EUR%20and%20NAT%20Documents/EUR%20Documents/020%20-%20EUR%20AMHS%20Manual/EUR_AMHS_Manual-Appx_G-v10_0.pdf
See also the OID Repository website reference for 1.3.27