IP LOA Generator

Generate a clean IPv4/IPv6 authorization letter in your browser. Nothing is uploaded.

Smart Auto-Fill

Paste prefixes and ASNs, then review detected registry and routing evidence before it is used.

Prefixes / ASNs

Document

Resource Relationship

Authorization Scope

Document ID

Issue Date

Effective Date

Expiration Date

Branding

Letterhead Name

Letterhead Address

Phone

Logo

Upload logo

Parties

Resource Holder

RIR Org ID / Handle

Resource Holder Address

Resource Holder Contact

Authorized Party

Authorized Contact

Prefixes

Lease / Parent Authority

Lease / Service Agreement Ref

Lessor Authority Source

Downstream Authorization

Parent Authorizing Party

Parent LOA Document ID

Parent LOA Issue Date

Parent LOA Signer / Issuer

Parent Covered Prefixes

Parent LOA Expiration

The parent/upstream authorization permits this downstream LOA for the listed resources. Parent evidence will be provided with the final PDF package if it is not embedded by this generator.

External Parent Evidence Reference

Routing Evidence

Origin ASN(s)

Transit / Route Propagation ASN(s)

IRR Route / Route6 Objects

RPKI ROA Records

IRR Status

RPKI ROA Status

Evidence Checked At

Legal & Authority

Signer Authority Basis

Governing Law / Venue

Revocation Notice Email

I certify that I have authority to issue this LOA and that the routing authorization is consistent with the resource holder's registry, contractual, and parent-authorization rights. I understand this tool does not provide legal advice, does not verify resource ownership, and does not replace current RPKI, IRR, registry, or provider requirements. I consent to use an electronic signature for this LOA, intend my signature to authenticate this document, and confirm that the signature is attached by or at my direction.

Parent LOA Evidence Summary

Identify Parent LOA PDFs

Signature

Typed Signature

Signer Name

Signer Title

Signer Email

Signer Phone

Upload Saved Signature

Letter of Authorization to Announce Internet Number Resources

To Whom It May Concern:

Authorized Prefixes

Prefix	Version	Origin ASN	Transit / Propagation ASN(s)	Max Authorized Length	Authority Path