You have answer from your statements itself as you mentioned the CDS:172-1443, then beyond these limits you should have UTRs at 5' and 3' ends of your mRNA as you have also given the UTRs positions. If you wish to confirm, you should also have genomic sequence to align your mRNA using tools like splign from NCBI to see whether your mRNA falling within CDS region starting from first codon ATG of exon1 with further exons. If you don't have genomic DNA, just do BLASTN analysis in NCBI or other genome database of the species of your interest to download the genomic sequence of the gene of interest also, then proceed with splign tool for exon intron boundary/coordinate prediction to findout whether your mRNA falling within the CDS or it has 5' and 3' UTR as well.