Summary

  • The 26 April 2011 order of the United States Bankruptcy Court for the District of Delaware granted Nortel Networks Inc. authority to sell its rights in approximately 666,624 legacy IPv4 numbers to Microsoft free and clear of liens, claims, encumbrances and interests, subject to a Legacy Registration Services Agreement.
  • The same transaction's amended sale agreement states that the legacy blocks were not under an allocation or assignment agreement with any regional or other internet registry, and required the purchaser to have entered the registry's agreement before the sale hearing. The registry-side act was therefore not a conveyance inherited from the debtor; it was a new contract with the buyer.
  • The registry's own policy text, in the version inspected, makes numbers nontransferable unless the registry has expressly approved a transfer in writing, and treats a finalised court order as one document evidencing an acquisition rather than as a substitute for its approval.

The Nortel sale is cited so often that it has become a shorthand: the moment internet addresses turned into property, sold by a court to the highest bidder for seven and a half million dollars. That shorthand is not a lie. It is just an account of one instrument in a transaction that needed two, and it buries the part that still determines whether a buyer of numbers actually gets them.

Read the documents in sequence and a different picture forms. A court did something real: it decided which entity's rights were being sold, and it stripped competing claims from those rights. A registry did something else: it decided whether the buyer would be recognised inside its own database, and on what terms. Between those two acts sits a clause in the sale agreement that almost no retelling of Nortel includes, and it is the clause that makes the case useful.

What the order actually did

The order sits in In re Nortel Networks Inc., et al., Chapter 11 Case No. 09-10138 (KG), in the United States Bankruptcy Court for the District of Delaware, with a caption reciting five docket entries. It records the 26 April 2011 hearing, and its operative sentence is blunt: "The Motion is granted. The Agreement and all of the terms and conditions thereof are hereby approved" (order).

What follows that sentence is the part worth reading closely. The court authorised transfer of the defined "Seller's Rights" in the internet numbers to Microsoft, free and clear of liens, claims, encumbrances and interests — subject to the Legacy Registration Services Agreement. Three things are happening there, and only the first is a property question. The court fixed the debtor's entitlement to transfer. It cleared the encumbrances that would otherwise travel with the sale. And it expressly made the transfer conditional on a contract the purchaser had to sign with a party that was not before the court.

That conditionality is not decoration. If the order had been self-executing against the registry, no such carve-out would have been necessary: the court would simply have ordered the records changed. It did not, because it could not. The registry was not a debtor, not a creditor, and not a defendant. It was the body that maintains a database, under a policy it publishes, and its cooperation is obtained by agreement rather than by writ.

The debtors' motion, filed on 21 March 2011, is where the ordinary commercial description lives. It sought authority under Bankruptcy Code sections 105, 107(b)(1) and 363 to sell approximately 666,624 legacy IPv4 numbers, and it stated that those numbers "were allocated to NNI's predecessors in interest in the 1990s" before those entities were merged into Nortel Networks Inc. (motion). It priced the original 16 March 2011 agreement at a gross USD 7,500,000 and split the asset into 470,016 initial numbers available for immediate use and 196,608 subsequent numbers then still in service for transition work. Those two figures add to the stated total, which is the sort of arithmetic that a sale motion should survive and usually does.

One line in the motion deserves more attention than it usually gets. The estate described the mechanism of transfer as a change to the point-of-contact information in the applicable regional internet registry's WHOIS database. That is how a seller inside an insolvency describes the registry side of a sale when it is thinking about paperwork. It is not how the registry describes it, and the gap between those two descriptions is the whole subject.

The clause that changes the story

The amended and restated asset sale agreement, dated 13 April 2011, names Nortel Networks Inc., a Delaware corporation, as Seller and Microsoft Corporation as Purchaser, and states the gross purchase price at the same USD 7,500,000 (agreement). It transfers the Seller's Rights in the legacy number blocks under section 363. So far, the property narrative holds.

Then comes Section 4.3. The agreement identifies the seller as the holder or assignee of the right to use all of the legacy blocks, and states that the blocks were not under an allocation or assignment agreement with a regional or other internet registry.

Stop there, because that sentence reframes the entire transaction. The seller was not an ordinary registry customer assigning a registration from one account to another. There was no registry agreement on the seller's side to assign. The legacy numbers sat in a relationship with the registry that the parties described in contractual language — a right to use, held or assigned — rather than in the standard registrant relationship the registry's policy manual contemplates. Whatever Nortel held, it was not the thing that a registration services agreement creates.

The agreement says the quiet part plainly. It required the purchaser to have entered into the Legacy Registration Services Agreement before the hearing on the sale order: "The Purchaser has, or prior to the date of the hearing to consider and approve the Sale Order will have, entered into the LRSA." And it represented that no other registry consent was required for the purchase of the Seller's Rights.

Now the sequence is visible. The court cleared the liens. The parties agreed the price and the asset. The buyer signed a contract with the registry. Only then could the buyer appear in the registry's records as the party entitled to be there. The sale closed twice, on two calendars, with two signatures, and only one of them was a judge's.

That framing is not a technicality invented by a lawyer with time on their hands. It is what happened on the registry's side, and the registry said so in public on the same day. ARIN's archived release of 26 April 2011 announced that Microsoft had received approval from the United States Bankruptcy Court in Delaware, and that internet number resources transferred from the Nortel bankruptcy would be placed under a registration services agreement between ARIN and Microsoft (ARIN release). The registry did not describe itself as obeying an order. It described itself as contracting with the recipient.

The registry's gate, in its own words

The policy text is worth reading for its grammar alone. The Number Resource Policy Manual, in the version inspected — Version 2025.1, dated 3 March 2026 — states in section 8.1 that "Number resources are nontransferable and are not assignable to any other organization unless ARIN has expressly and in writing approved a request for transfer" (NRPM). That is not a description of a registry rubber-stamping a court. It is a registry asserting that its own written approval is the operative act.

The routes through that gate are distinct. Under section 8.2, a merger, acquisition or reorganisation transfer requires the recipient to show that it acquired the assets using the resources, or acquired the entire entity that was the current registrant. Under section 8.3, a specified-recipient transfer names the source as the current registered holder and requires the recipient to satisfy section 8.5, which demands coverage by a registration services agreement, demonstrated operational use, a minimum IPv4 transfer size of a /24, and documentation of projected use for larger blocks.

The registry's operational guidance makes the same point in procedural language. Transfer requests "must meet the requirements of ARIN transfer policies in order to receive approval," and for a merger or acquisition transfer an authenticated finalised court order is listed as one possible document evidencing the asset transfer — alongside an asset purchase agreement, a bill of sale, a merger agreement or a public filing (transfer guidance). A court order appears there as evidence in a file, not as the decision itself.

The contract completes the picture. The Registration Services Agreement, in the version inspected — Version 14.0, dated 15 August 2025 — grants the holder "The exclusive right to be the registrant of the Included Number Resources within the ARIN database," together with the right to use them and the right to transfer registration pursuant to registry policies, and it bars assignment or transfer of the agreement or related rights without the registry's prior written permission (RSA). Read that clause twice. The exclusive right to be the registrant is created by the contract. It is not a pre-existing property right that the contract merely acknowledges.

Both current-version texts describe the regime as it stands in 2025 and 2026, not as it stood in the spring of 2011, and nothing in this record establishes which numbered version governed the Nortel transfer. The mechanism, however, is visible in the 2011 documents themselves: a buyer obliged to sign the registry's agreement before a hearing, and a registry announcing an agreement with that buyer on the day of the order.

Two sets of books had to agree

The most practical way to see the split is to count the records. The estate kept one set: schedules, a sale motion, a purchase agreement, an order, a closing. The registry kept another: a database entry naming a party entitled to be the registrant, maintained under an agreement that party signed.

Nothing in the bankruptcy process could write to the second set. A court can determine that a debtor holds transferable rights, can value them, can authorise their sale and can cleanse liens. It cannot enrol a new customer in a private database governed by a policy to which the debtor may not even be a party. That is why the Nortel agreement contains the LRSA condition: the parties understood that the buyer needed a relationship with the registry that the seller did not have to give.

The order still mattered enormously, and it is worth being precise about how. It converted a contested question — who among the Nortel entities held these rights, and who could object to their sale — into a document a third party could rely on. It gave the registry something to evaluate: an authenticated, finalised order evidencing an acquisition, exactly the evidentiary category the registry's guidance lists. It removed the liens that would otherwise have made the buyer's position uninsurable. What it did not do was make Microsoft a registrant.

The motion's own WHOIS line shows how easily that distinction gets lost in practice. Changing a point of contact is a few fields in a database. It looks like the whole of the registry side of a sale, and inside the estate it probably felt like a clerical step to be completed after closing. The registry's requirements were heavier: an approved transfer under its policy, a recipient that qualified, and an agreement. A buyer that budgeted for a point-of-contact change and discovered a policy gate would not be the first.

Why the property reading survives anyway

The property reading is not stupid, and it is not only a journalist's shortcut. A court did approve the sale of something for USD 7,500,000. Bloomberg Law's practitioner primer notes that the Delaware court approved Nortel's sale of more than 600,000 IPv4 addresses to Microsoft for that price on 26 April 2011, while observing that the court dealt with the ownership question indirectly, by approving the sale rather than issuing a standalone holding on whether the addresses were property (Bloomberg Law).

That is the honest description. The order is strong evidence about the parties' entitlements and weak evidence about the abstract legal status of internet numbers. It functioned in the bankruptcy as a sale of rights, and it functioned in the registry's process as proof of an acquisition. Neither function required a court to declare that IPv4 addresses are property, and the order does not make that declaration.

The durable lesson of Nortel is therefore not a price. It is a structure: an insolvency sale of registered numbers closes twice, once in the estate's forum and once in the registry's process, and the second closing has its own gatekeeper, its own conditions and its own clock. Every subsequent sale of legacy space by an estate, a receiver or an administrator inherits that structure, whether or not the paperwork acknowledges it.

What the record does not settle

The court filings were read through public mirrors rather than the official docket copy, so docket entry numbers are as recited in the order's caption. No transfer request file, approval letter or internal disposition record from the registry was obtained, and the specific blocks transferred are not identified in the reviewed documents. The two policy instruments cited carry 2025 and 2026 version dates and are not asserted to be the texts in force in 2011. The statement that no other registry consent was required appears in the parties' agreement as a contractual representation, not as a registry determination.

One test would overturn the argument. If a reviewed order had purported to amend or bind the registry's records, or if a reviewed registry document had shown a transfer processed on judicial authority alone, the property reading would carry the day and the registry would be subordinate to the insolvency court. Nothing in this record shows that. What it shows is a court doing its work thoroughly, and then a buyer signing a contract because the court's work was not enough.

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