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.
Pricing and Plan Details
Item
Details
Fees / Pricing
Additional IPv4 space is requested through a sales representative, and pricing is quoted on request.
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
Cogent is a network operator first. Connectivity service levels cover connectivity. Prefix provisioning, reputation and ROA maintenance sit outside those service levels.
Details on Request
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 are confirmed with the company on request.
Related Resources
Cogent website
Cogent 2025 annual report, including the IPv4 leasing disclosure