Aircraft communications from over the oceans can be very boring at times or very exciting!
Along with the use of satellite communications, commercial and military aircraft use 
either the VHF/UHF frequencies when over or near land and switch to 
HF frequencies when over oceans and far beyond line of sight with land based ground stations.
All of these frequencies are not active all the time, so be patient and tune around,   I suggust starting at the 10mHz range then try +/- to 8 or 11 mHz
The aeronautical voice communications stations and frequencies listed  in the tables 
below are available to and utilized by the U.S. FAA Air Route Traffic Control Centers (ARTCCs) for air traffic control purposes. 
The frequencies in use will depend upon the time of day or night and conditions which affect 
radio wave propagation especially on HF frequencies. Voice communications are handled on a single channel 
simplex basis (i.e., with the aircraft and the ground station using the same frequency for transmission and reception) unless otherwise noted in remarks. 
The stations will remain on continuous watch for aircraft within their communication areas,  San Francisco and New York Radio
and when practicable, will transfer this watch to another station when the aircraft reaches the limit of the communications area. 
Stations listed below which are designated "FAA" are operated by the U.S. FAA Flight Service Stations. Stations designated "ARINC" are operated by Aeronautical Radio, Incorporated. 
Upper SSB freq in kHz  Area covered,  all areas may have different control stations,  on different frequencies
2932 North Pacific Network San Francisco
5628 North Pacific Network San Francisco
5667 North Pacific Network San Francisco
6655 North Pacific Network San Francisco
8915 North Pacific Network San Francisco
8951 North Pacific Network San Francisco
10048 North Pacific Network San Francisco
11330 North Pacific Network San Francisco
13273 North Pacific Network San Francisco
13339 North Pacific Network San Francisco
17946 North Pacific Network San Francisco
21925 North Pacific Network San Francisco
3413 Central East Pacific One Network San Francisco Central East Pacific is the frequencies used for aircraft in route Hawaii, there are many and lots of voice activity. 
3452 Central East Pacific One Network San Francisco
5574 Central East Pacific One Network San Francisco
6673 Central East Pacific One Network San Francisco
8843 Central East Pacific One Network San Francisco
10057 Central East Pacific One Network San Francisco IN POCATELLO, a good starting frequency  10,057  
13354 Central East Pacific One Network San Francisco
2869 Central East Pacific Two Network San Francisco
5547 Central East Pacific Two Network San Francisco
11282 Central East Pacific Two Network San Francisco
13288 Central East Pacific Two Network San Francisco
21964 Central East Pacific Two Network San Francisco
2998 Central West Pacific Network San Francisco
4666 Central West Pacific Network San Francisco
6532 Central West Pacific Network San Francisco
8903 Central West Pacific Network San Francisco
11384 Central West Pacific Network San Francisco
13300 Central West Pacific Network San Francisco
17904 Central West Pacific Network San Francisco
21985 Central West Pacific Network San Francisco
3494 (LDOC)  See note below. San Francisco
6640 (LDOC)  See note below. San Francisco
11342 (LDOC)  See note below. San Francisco
13348 (LDOC)  See note below. San Francisco
17925 (LDOC)  See note below. San Francisco
21964 (LDOC)  See note below. San Francisco