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What should I do if specific countries or number prefixes suddenly become unreachable on my VoIP routes?
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Immediately contact your supplier to determine if the block is on their side or an upstream carrier issue prompt response can save time and revenue.
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Sometimes blocks are regulatory or regional — ensure the supplier has legal routing and multiple interconnects for redundancy.
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Use route monitoring systems to detect blocked prefixes in real-time, and reroute traffic dynamically to minimize loss of service.
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Keep backup routes or suppliers for your most valuable destinations to ensure you can switch quickly when blocks occur.