[ORGN/]SITA and AFTN structures of FPL Originators (and destinataries)

[Verun]

Dear friends,

I'm looking for the structure of these addresses.

AFTN:XXXXYYYZ
XXXX=ICAO Code of the airport where is based the flight dispatching (is this correct?)
YYY=ICAO Code of the company
Z=What used to indicate the last letter?

E.g. ORGN/EBBRSABU
EBBR Brussels
SAB Sabena
U=?

SITA:XXXYYZZ
XXX=IATA Code of the airport where is based the flight dispatching (is this correct?)
YY=What do these letters?
ZZ=IATA Code of the company

E.g. ORGN/TSROPV3
TSR Timisoara
OP=?
V3 Carpatair

And, why I use SITA code instead AFTN?Which is the difference?

I know that the destinataries are 2
SITA addresses
PAREP7 BRUEP7X
AFTN addresses
EUCBZMFP EUCHZMFP.

But If is possible i would to know in which cases i have to send the FPL to others destinataries, for example at an A.C.C. or Aros with this scheme.
zqzx Acc
zfzx Fic
zazx App
ztzx Twr
ysyx Afiu
zpzx Aro

E.g. LIIRZEZX LIPZZPZX

Thx guys.

Verun

[Grasscarp]

If you use the search function you will find this was asked and answered before in 2009.

[Verun]

Thank you Grasscarp, found it.
http://www.pprune.org/flight-ground-ops-crewing-dispatch/361853-aftn-sita-address-structure.html
http://www.pprune.org/flight-ground-ops-crewing-dispatch/360069-aftn-flight-plan-addresses.html

Sorry for the "double-topic".

Verun

[Capt Wannabe]

Let's all be grateful that Tower Air never had a Ticket Office in Cancun :O