Preparing an ARIN IPv4 Transfer as a Source Organization
Selling IPv4 address space is not a simple transaction. Under ARIN policy, source organizations must prove ownership, ensure compliance, and coordinate documentation before a transfer can be approved. A well prepared seller avoids delays, rejected applications, and legal disputes.
This checklist explains the complete preparation process for organizations planning to transfer IPv4 resources while maintaining operational stability and registry compliance.
Step 1: Confirm Legal Ownership
The first requirement is clear ownership. ARIN only approves transfers when the source organization is the legitimate registered holder of the address block.
You should verify:
• Organization name matches ARIN records
• Corporate structure has not changed without updates
• Legacy resources are properly registered
• Contact information is current in ARIN portal
If company mergers or acquisitions occurred, documentation must reflect the new legal entity before transfer begins.
Step 2: Review Block Eligibility
Not all address ranges are immediately transferable. ARIN requires that resources are valid and not restricted by policy conditions.
Check the following:
• Block size meets minimum transfer policy
• No pending disputes exist
• Resources are not under investigation
• Registration services agreement is signed
Incomplete registration agreements commonly delay transfers.
Step 3: Clean Up Routing and Usage
Before listing the block for sale, the organization must stop announcing the prefix if it is no longer operationally required. Buyers need clean routing space without conflicts.
Preparation includes:
• Removing active BGP announcements
• Clearing reverse DNS records
• Ending active assignments to customers
• Updating internal documentation
This ensures the buyer can deploy the range without operational problems.
Step 4: Perform Reputation and Blacklist Checks
Address reputation significantly affects value. Email providers and security networks track past activity associated with IP ranges.
You should verify:
• Spam database listings
• Abuse reports
• Malware history
• Prior leasing activity
Clean address history increases buyer confidence and speeds negotiations.
Step 5: Gather Required Documentation
ARIN requires formal documentation before approving a transfer. Sellers should prepare records early to avoid delays.
Typical requirements include:
• Proof of ownership
• Corporate authorization letter
• Officer identification
• Transfer agreement draft
Well organized documentation shortens review time significantly.
Step 6: Work With a Transfer Facilitation Service
Most organizations choose professional assistance to manage the process. IPv4Hub.net helps sellers navigate ARIN transfer procedures from listing to completion. The platform connects source organizations with qualified buyers and coordinates documentation submission according to registry policy. It also validates address reputation through blacklist checks and supports communication throughout approval stages. By guiding sellers through compliance steps, IPv4Hub reduces errors that commonly cause transfer rejections.
Step 7: Submit Transfer Request to ARIN
Once a buyer is confirmed, both parties submit a transfer request through ARIN’s portal. The registry reviews justification, ownership, and policy compliance.
During this phase ARIN may request:
• Additional verification documents
• Clarification of corporate authority
• Confirmation of address availability
Quick responses help maintain approval timelines.
Step 8: Final Approval and Record Update
After review, ARIN updates the registry database to reflect the new holder. At this stage:
• Seller relinquishes control
• Buyer gains registration rights
• Routing authorization transfers
Payment and legal completion occur according to the purchase agreement.
Common Mistakes Sellers Should Avoid
Many delays occur due to preventable issues. Sellers should avoid:
• Outdated registration information
• Incomplete documentation
• Active routing conflicts
• Unverified legacy resources
Preparation is the difference between a smooth transfer and months of delay.
Why Preparation Matters
IPv4 address space is valuable infrastructure. Buyers expect clear ownership, clean history, and policy compliance before committing to purchase. Proper preparation protects both parties and preserves the integrity of internet routing systems.
A structured checklist ensures the transfer proceeds efficiently and reduces risk for everyone involved.
Selling IPv4 resources through ARIN requires more than signing a contract. It involves verification, documentation, and coordination with registry policy. Organizations that prepare carefully can complete transfers quickly and securely.