These are the best starting places to locate spectra for your compound. You will find more spectroscopy resources, including print collections (like Aldrich) and online textbooks, on the Spectra guide.
Search by substance to bring up the (CAS Registry) record, look for the Experimental Spectra list. A "See Spectrum" link means the spectrum is available. Otherwise you will be directed to an article where you'll find the spectrum and/or numeric data.
Free database of hundreds of thousands of spectra, including NMR, IR (including ATR-IR), Raman, UV-Vis, and Mass. Search by chemical name, CAS-RN, or InChiKey. You can upload and overlay your own spectrum for comparison.
Free, but registration is required. Some ads as well.
Free database of millions of chemical substances, with spectral information for about 300K substances (found in the Chemical and Physical Properties section of the substance record).
The data is sourced from several organizations, including SpectraBase, MassBank of North America, NIST Mass Spectrometry Data Center, and NMRShiftDB, the NIST/EPA/NIH Mass Spectral Library, the Hazardous Substances Data Bank (HSDB), and the Human Metabolome Database (HMDB).