Notes. Right ascension and declination represent the coordinates of the phase center of the observations. “Gain calibrator” is the complex-gain calibrator used for each target. Beam sizes (full width at half maximum) and beam position angles (p.a., measured north to east) are those of the continuum images at 43 GHz. T_on is the total integration time on each source. The coordinates of H 2–18 are those given in Gathier et al. (1983), since the position given in the SIMBAD database, at the time of our observations, actually corresponded to a different object, IRAS 17403–2107 (see Sect. 4.2.3). Sample 1 comprises PNe with known OH and/or H₂O masers (Sect. 2.1). The references listed for this sample correspond to their identification as PNe and the report on the presence maser emission. Sample 2 includes single-dish SiO maser detections near PNe and radio continuum sources (Sect. 2.2). Their references correspond to their identification as PNe or the presence of radio continuum emission, and the single-dish reporting of maser emission. (1) Gómez et al. (2015), (2) Suárez et al. (2015), (3) Kimeswenger (2001), (4) Uscanga et al. (2014), (5) Cala et al. (2022), (6) Sevenster et al. (1997b), (7) Payne et al. (1988), (8) Henize (1967), (9) de Gregorio-Monsalvo et al. (2004), (10) Gómez et al. (2005), (11) Jacoby & Van de Steene (2004), (12) Sevenster et al. (1997a), (13) Pottasch et al. (1987), (14) García-Hernández et al. (2007), (15) Suárez et al. (2006), (16) Gómez et al. (2008), (17) Vyssotsky et al. (1945), (18) Seaquist & Davis (1983), (19) Miranda et al. (1998), (20) Miranda et al. (2001), (21) Hall et al. (1990), (22) Douglas et al. (1996), (23) Deguchi et al. (2004), (24) Condon et al. (1998), (25) Gathier et al. (1983), (26) Izumiura et al. (1995), (27) Deacon et al. (2007), (28) Garwood et al. (1988), (29) White et al. (2005), (30) Nakashima & Deguchi (2003a).