This page outlines the technical, operational and commercial details of Cogent Communications, a network operator that leases IPv4 address space from its own inventory, both on its own and alongside its Internet access services.
Looking for the best IP providers? Cogent is a direct lessor rather than a broker or marketplace: its 2025 annual report describes leasing IPv4 addresses on a standalone basis as well as with connectivity, on contracts from one month to five years. Very little of the standalone product is published beyond that. Cogent Cloud Connect is connectivity, not BYOIP support. Nothing reviewed shows that a leased Cogent block is ready for import into any cloud, so obtain a block-specific authorisation and compatibility statement.
This listing was compiled from Cogent's own published pages and its 2025 annual report. It is editorially researched rather than vendor-confirmed, so fields the company does not publish are marked as not published rather than estimated, and no customer price is inferred from investor revenue figures.
United States (2450 N Street NW, Washington, DC 20037). A Delaware corporation.
Lessor
The annual report names Cogent's IPv4 Issuer subsidiary as the primary lessor, with other operating subsidiaries leasing the remainder. Confirm the contracting entity on the order.
RIR Standing
Not verified in this review.
ARIN Facilitator Status
No. Cogent does not appear on ARIN's published Qualified Facilitator list (checked 29 September 2026). As a direct lessor rather than a broker, that programme is not the relevant test.
Sales Contact
info@cogentco.com, +1 202 295 4200, or a Cogent sales representative
Support
24-hour support desk and the eCogent portal for tickets, contact updates and DNS requests
Service Capabilities
Capability
Details
Offer Type
Lease. Standalone IPv4 leases and leases alongside Internet access are both described in the annual report. No retail purchase, sale or lease-out programme for customer-held space is published.
Supply Model
Direct. Addresses come from Cogent's own inventory rather than third-party holders.
Lease Configurations
The annual report describes existing leases with terms from one month to five years as of 31 December 2025. That is a description of the book, not a published current offer.
Supported RIRs
Not published for leases. Confirm the registry and any regional restrictions of the offered block.
IPv4 / IPv6
IPv4. The FAQ accepts requests for IPv6 space, but no standalone IPv6 leasing product is published.
BYOIP Support
Not published. Cloud Connect provides connectivity to cloud platforms and is not evidence that a leased prefix can be imported into one.
Technical Requirements
Requirement
Details
Minimum Prefix Size
Not published for standalone leases. The single /31 the FAQ includes with a connectivity order is not a lease minimum.
Maximum Prefix Size
Not published.
Provisioning Time
Not published for standalone leases. Connectivity installation dates are a different thing.
Announcement
Not published. A standalone lease does not by itself establish permission to originate the block from another ASN, cloud or carrier.
RPKI / ROA / LOA
Not published for standalone leases. Ask who issues the LOA, which origins the ROA will authorise and who maintains it.
WHOIS / RDAP
Not published. Registration and reassignment rights, including anything a cloud uses to verify control, need to be agreed.
Reverse DNS
General DNS services are documented. Reverse delegation for a standalone block needs confirmation.
Abuse
Reports go to Cogent's abuse desk. Response obligations and cleanup charges for a leased block are set by the contract.
Cost and Limitations
Item
Details
Fees / Pricing
Not published. Additional IPv4 space is requested through a sales representative. Treat this as a quote-only provider.
Billing Cycle
The general FAQ describes monthly billing in advance with a prorated first invoice. Confirm that it applies to a standalone lease.
Cancellation
The general FAQ asks customers to check their contract and usually requires 30 days' written notice at the end of a term. Confirm the lease-specific rule.
Scope Limitation
Cogent is a network operator first. Connectivity service levels should not be read as commitments on prefix provisioning, reputation or ROA maintenance.
Not Published
Standalone lease prices, prefix sizes, RIR, contracting entity, permitted origins, LOA and ROA handling, geolocation, reputation, KYC, delivery time, renewal pricing and address-retention protections. Request them directly.
Related Resources
Cogent website
Cogent 2025 annual report, including the IPv4 leasing disclosure
BYOIP, or Bring Your Own IP, is a service that allows you to use your own IP addresses with cloud providers and hosting services. This gives you more control over your IP reputation and allows you to maintain your existing IP addresses when switching providers.
BYOIP offers several benefits including maintaining your IP reputation, reducing costs by avoiding IP address purchases, and providing more control over your network infrastructure. It's particularly useful for businesses that need to maintain consistent IP addresses across multiple service providers.
BYOIP is available to organizations that own registered IP address blocks. This typically includes businesses, hosting providers, and organizations that have obtained IP addresses from Regional Internet Registries (RIRs) like ARIN, RIPE, or APNIC.
Yes, you typically need to own or have authority over the IP address blocks you want to use. This usually means having registered IP addresses through a Regional Internet Registry (RIR) or having proper authorization from the IP address owner.
Proof of IP ownership typically includes documentation such as ROA (Route Origin Authorization) records, LOA (Letter of Authorization) documents, or registration records from RIR databases. The specific requirements vary by provider.
Yes, BYOIP is secure when properly implemented. Providers use various verification methods including ROA records, certificates, and registration checks to ensure only authorized IP addresses are used. However, it's important to follow security best practices and maintain proper IP address management.
The setup time varies by provider and depends on factors such as prefix validation, ROA creation, and verification processes. Typically, it can take anywhere from a few hours to several days, depending on the provider's requirements and verification process.
Yes, many providers support BYOIP across multiple geographic regions. However, the specific regions and locations supported vary by provider. Some providers offer global BYOIP support, while others may be limited to specific regions.
When you stop using BYOIP with a provider, your IP addresses are typically returned to your control. The provider will stop advertising your IP prefixes, and you can use them with another provider or return them to your normal routing. It's important to coordinate the transition to avoid service disruptions.
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