Summary of Attribution info from RINEX headers.  For each group of stations the point of contact(s) found in RINEX header information is provided below.

CN20, CN21, CN23, CN24, CN25, CN30, TGMX, TGPM, TNAT, TNCC, TNCM, TNLC, TNMS, TNNX, TNTM
Meghan Miller, UNAVCO Community, UNAVCO              

OXUM, TNAL, TNCN, TNCY, TNMO, TNMQ, TNNP, TNSJ, UAGU, UCOE, UGEO, UNPM, UTON, UXAL
Enrique Cabral, Universidad Nacional Autonoma de Mexico

BIJA, BON2, CABA, GRZA, HATI, LAFE, LEPA, PNE2, PUJE, PUMO, QSEC, VERA
Timothy Dixon, University of Miami    
                
CGUI, JCFI, KIOS, ELMA, MOM0, MOMI, SCW2
Peter LaFemina, Pennsylvania State University  

MMD1, MMX1, MPR1, MTP1
Tom McHugh, FAA

CNC0, ROA0
John Braun, UCAR
                             
GCEA, GCFS
Lands and Survey,Cayman Islands Government 
Anthony Watts, CAYMAN        

COL2
Guideo Alejandro Gon, jmarellanov Instituto Nacional de Estadistica,                       

GUAT
Oscar Cruz Ramon, V. Robles, Vinicio Robles Perei, Instituto Geografico Nacional, Guatemala

MANA
Frank E Marion, NOAA, National Geodetic Survey          
G. Medina, Ramon Avilez, Instituto Nicaraguense de Estudios Terri
                  
MXMX
SN Support, SmartNet North America

SSIA
Carlos Rodriguez, Jalmar Najarro,Wilfredo Amaya Zelay, Centro Nacional de Registros  
Frank E Marion, NOAA, National Geodetic Survey

TECO
Chuck DeMets, University of Wisconsin-Madison  

TEG2
Tomas Rojas, DGCG

HGPA, HGTO, JAGU, MRCU, MXTO
could not find info