S7 not sending some text messages

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S7 not sending some text messages

I've been told by several contacts on different services that some of my text messages are not sending. They show as sent on my phone but do not arrive to the contact. This was first noticed on Saturday but today it's happened at least three different times with three different contacts with two different providers. I live near Knoxville, tn it happened twice from work in Knoxville and once from home over thirty miles away. On Saturday I was in Atlanta when it happened. Is this an issue with my phone or is it somehow related to Irma?