Message Sender without number

Hello Pavan_0727,

Let's start off by checking the helpful steps in this article which can help with this issue: Block, filter, and report messages on iPhone. This section gives more detail on blocking unknown senders:

"Filter messages from unknown senders

With iMessage, you can filter messages from unknown senders, and you won’t get notifications from them.

Go to Settings > Messages, scroll down to Message Filtering, then turn on Filter Unknown Senders.

When this setting is on, you can only see messages from people who aren’t in your contacts when you go to Filters > Unknown Senders.

Note: You canʼt open any links in a message from an unknown sender until you add the sender to your contacts or reply to the message."

Let us know if we can help with anything else at all or if this doesn't settle your issue so we can look into this further with you. Thanks and have a fabulous day!