Search fiber lit buildings by address
CarrierFinder shows which carriers are on-net or near-net at any U.S. commercial address — from a database of 5.4M fiber lit buildings, 3.2M fiber route miles, and 115M serviceable locations.
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See how fiber maps work →
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5.4M
Fiber lit buildings
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3.2M
Fiber route miles
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115M
Serviceable locations
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What is a fiber lit building?
A fiber lit building is a commercial site where a carrier has already brought fiber into the building and can typically deliver service without a long off-net build.
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On-net
Fiber is already in the building.
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Near-net
Fiber is close by; a short extension may connect the building.
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Off-net
Fiber is farther away and may require a longer build.
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Search 5.4M fiber lit buildings
Enter a U.S. commercial address to see which carriers can serve it. CarrierFinder helps MSPs, consultants, and teams qualify opportunities faster.
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On-net vs near-net
On-net locations are already connected to a carrier network. Near-net locations are close to existing fiber and may be serviceable with a short extension.
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Built for MSPs and consultants
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Qualify serviceability before recommending a solution.
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Compare carrier options across commercial locations.
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Build a clearer shortlist for clients.
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Move from address research to a confident conversation faster.
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Fiber lit buildings + fiber maps
Pair building-level availability with fiber route context. Explore fiber maps →
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Request pricing
Need help turning a qualified location into a quote? Request pricing →
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FAQ
How is this different from the FCC National Broadband Map?
CarrierFinder focuses on commercial fiber availability and building-level data.
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Do I need a paid plan to search?
You can sign up for free to search fiber availability. Professional plans add seats, widgets, API access, and batch tools.
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Can carriers contribute their building data?
Yes. Providers can upload fiber lit buildings and KML routes at no cost.
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Ready to find fiber?
Try CarrierFinder for free