Number-letter combination premium domains: What a mixed short domain is worth

What number-letter combination premium domains are

A number-letter combination premium domain is a mixed alphanumeric .com that contains at least one letter (A to Z) and at least one digit (0 to 9) to the left of the extension, with no hyphen and no other character.

The shorthand uses L for letter and N for number. NL marks a digit-then-letter name like 3M.com, and LN marks a letter-then-digit name like M3.com.

The class is defined by the mix itself. It excludes the two pure pools that sit on either side of it:

• The pure-letter pools: LL, LLL, LLLL.
• The pure-number pools: NN, NNN, NNNN.

The category qualifies on composition, then sub-divides by length.

A name joins the class on form alone: one letter, one digit, .com, nothing else. Length then splits the pool into three tiers that behave on distinct logic.

The two-character tier (NL, LN) holds only 520 names and trades like the scarcest letter and number classes. The three-character tier holds 28,080 names across six patterns and trades as a brandable mid-market.

The four-character tier holds over 1.2 million names and trades mostly at the floor, with a thin top end reserved for recognizable acronyms and pronounceable strings.

The shorthand refers to composition, not value: the same code can describe a $100 string and a six-figure brand.

The shorthand fixes membership; length and composition fix the price, and within each tier brevity and memorability decide where a name lands.

Every short mixed .com is an aged domain.

The 520 two-character and 28,080 three-character mixed combinations were claimed across the late 1990s and early 2000s, and both pools have stayed fully registered since.

No short mixed .com is available at the registration fee, so acquisition runs through the aftermarket and drop-catch, which makes every tradable name an aged domain with a registration history attached.

That provenance is what separates a clean inherited asset from one carrying penalty residue, a distinction examined in Aged domain case studies by niche.

Why the mixed class is the hybrid tier between letters and numbers

The number-letter class is the hybrid tier because it inherits demand from two markets at once. Two buyer pools bid on the same name:

• The Western corporate-acronym and brandable market, which values memorable short strings.
• The Chinese short-domain market, which prices each digit by homophone.

A mixed name draws bids from both pools, yet it trades at a 2x to 5x discount versus a pure-letter or pure-number name of equal length. The single digit that defines the class is both its demand multiplier and its ceiling cap.

The discount has a clear mechanism. A pure-letter name reads as a clean potential brand or acronym to a Western buyer, and a pure-number name reads as a clean lucky string to a Chinese buyer.

A mixed name reads as neither in full: the digit interrupts the acronym for the brand buyer, and the letter interrupts the homophone for the numerology buyer.

The name keeps a foot in both markets, which sustains liquidity, but it forfeits the top of each.

That is why a premium two-letter LL.com floors near $270,000 (Giuseppe Graziano, Domain Holdings) while a comparable two-character mix trades well below it.

The mixed class shows up as only 3 of the 100 names in NameBio’s 2024 Top 100, even though its low tiers transact constantly.

Dual demand is the strength; the mixed read is the cap.

The hybrid position keeps the class liquid through cycles, because a slump in one market is partly offset by the other.

Chinese short-domain speculation peaked in late 2015 and corrected through 2016. Mixed patterns with Western acronym value held better than pure speculative numbers, and mixed patterns with chip-letter value held better than random Western strings.

The same logic that drives the pure classes still applies here, just split across two buyer pools instead of concentrated in one. The scarcity-driven letter market is detailed in LLL.com three-letter premium domains, and the homophone-driven number market in NNN.com and NNNN.com numeric domains.

How that dual-sourced demand reads as turnover across the wider short-domain market is set out in Premium domain liquidity.

How many number-letter combination .com domains exist

The short mixed alphanumeric .com universe totals 1,241,240 combinations: 520 two-character names, 28,080 three-character names across six patterns, and 1,212,640 four-character names across fourteen patterns.

Each count follows from multiplying the 26-letter alphabet by the 10-digit range. Each cross-checks against the formula of all strings minus all-letter minus all-digit.

Scarcity scales sharply down with length. The two-character tier behaves like a different asset than the four-character tier.

Scarcity sets the floor, and a smaller pool sets a steeper one.

The 520-name two-character tier is small enough that buyers compete for the chip-letter examples the way they compete for two-letter pure names, which holds floors high.

The 28,080-name three-character tier is large enough to host a brandable mid-market but small enough that premium LLN and NLL names stay scarce.

The four-character pool, at over 1.2 million names, is so deep that scarcity alone supports almost nothing: a four-character mix needs an acronym or a pronounceable read to clear the floor.

Length is the first lever on price, and the combinatoric counts explain exactly why.

Which pattern hierarchy commands the highest aftermarket value

Two-character NL.com and LN.com sit above every three-character pattern, because the 520-name pool is structurally scarce.

Within the three-character tier, pattern position drives value. More letters and fewer digits read cleaner, so LLN ranks above NLL, LNN, NNL, with LNL and NLN trailing on pattern alone.

The four-character tier sits below all three-character patterns, except where a name forms a recognizable acronym or a pronounceable brandable. Two hierarchies operate at once, and they can invert at the three-character tier.

The two hierarchies diverge where culture meets branding. Chinese-reseller pricing weights pattern position heavily and ranks LLN above the digit-heavier patterns, since fewer digits read cleaner to a numerology buyer.

Western branding inverts part of that order by lifting any LNL that matches an active mark: B2B.com and Y2K.com out-trade their pattern position because the string itself is recognizable.

On pattern alone LNL.com is generally less desirable than LLN.com (NamePros), so the order holds for random names and breaks only when a specific string carries acronym meaning.

A defensible appraisal reads the pattern first, then checks whether the exact string overrides it.

Which corporate brands prove the number-letter acronym fit

Established brands operate on number-letter .com domains across every short pattern. The set spans 3M.com (3M Company, NL), M3.com (Tokyo-listed M3, Inc., LN), 7Up.com (Keurig Dr Pepper, NLL), B2B.com and Y2K.com (recognized business and cultural strings, LNL), and 9gag.com (the viral-content network, NLLL).

Each name shows that a mixed pattern can carry a real brand when the string itself reads as a meaningful acronym.

The digit has to belong to the brand, not interrupt it.

The brands that thrive on mixed names share one trait: the digit reads as intentional.

3M, 7Up, B2B, and Y2K all use the number as a load-bearing part of the name, so the mix reads clean to a human even though it fails the pure-letter ideal.

That is the difference between a mixed name that commands an end-user price and one that sits at the investor floor.

End-user sales transact at roughly twice investor-to-investor levels (GGRG), and a mixed name only reaches that end-user tier when a buyer already reads the string as a brand.

The reasons businesses pursue an aged premium name in the first place are documented in Why businesses buy an expired or aged domain: 7 SEO use cases with documented outcomes.

How the Chinese-market overlay prices a mixed pattern

The Chinese short-domain market is roughly 80 percent of the short-domain buyer pool, and it applies its letter and digit rules to mixed names the same way it applies them to pure numbers. Chinese Premium scores each half of the name:

• Chip letters B through Z earn the premium, while the letter V (absent from pinyin) and the vowels A, E, I, O, and U are excluded.
• The digit 8 (prosperity) adds a premium.
• The digit 4 (death) cuts value by 30 to 60 percent versus an equivalent no-4 pattern.

A mixed name carrying a vowel or a 4 loses the Chinese bid, even when its Western acronym value holds.

Chip letters and lucky digits compound; vowels and the 4 subtract.

The overlay is additive. A two-character mix built from a chip letter and an 8, such as a clean N8 or 8N pattern, draws the strongest Chinese bid because both halves score.

The digit 4 sounds like the word for death. A mix carrying a vowel forfeits the letter premium, and a mix carrying a 4 forfeits far more, since that homophone is the strongest discount in the entire short-domain market.

Chip-letter names are prized; vowel-or-4 names are not. The digit 6 (wealth and flow), the digit 9 (longevity), and a trailing 0 (completeness) add milder premiums.

These rules are why two structurally identical mixed patterns can sell orders of magnitude apart: the chip-letter, no-4 version clears in the Chinese market while the vowel-or-4 version is left to Western demand alone.

Cross-border access is its own barrier.

The deepest Chinese liquidity lives on eName.cn, 4.cn, and 22.cn. These platforms require a Chinese phone number and address for account creation, so a buyer outside China is largely blocked from the venues where chip-letter mixed names see the deepest trading.

The standard workaround is a broker with in-market accounts, a cross-border registrar such as GName.com, or a Western marketplace (Sedo, Afternic, Dan) that carries Chinese buyer pools.

That access gap is a structural cost the headline price never shows.

What benchmark mixed-domain sales reveal about value

The mixed market is a pyramid: a deep base of four-character names trading near $100, a brandable mid-band of two-character and three-character names in four and five figures, and a thin ceiling reached only when a string carries end-user brand value.

An active NamePros buyer band runs $5,000 to $90,000 across two-character and three-character mixed patterns. The pure-letter and pure-number anchors above the class mark the ceiling the mixed class trades beneath.

These are historical market data points from NameBio, NamePros, and broker records, not a forecast and not advice about any specific purchase.

The headlines are pure classes; the volume is mixed mid-market.

The ceiling sales that define short .com value are pure-letter or pure-number names: two-letter IG.com sold for $4.7 million and the LL.com floor near $270,000 are the anchors a mixed name is measured against, and the mixed class trades at a discount to both.

The IG.com price was double the $2.1 million paid for the numeric 114.com, and the disclosed two-letter average across a decade runs near $478,118 depending on letter quality.

Beneath those anchors, the real volume is the mixed mid-market, where an active NamePros buy thread set a $5,000 per item floor to a $90,000 budget ceiling and multiple sellers responded, confirming live demand for two-character and three-character names.

NameBio’s 2024 Top 100 contained only 3 alphanumeric names against the 2025 average .com resale of $23,264, which confirms the shape: a thin high-value tail over a deep, constantly transacting base.

The class is liquid in the middle and rarely spectacular at the top, and reported prices vary widely by exact string.

Comparable-sales analysis is the defensible mixed valuation method.

Because pattern and composition are mechanical, a defensible mixed valuation anchors on comparable sales instead of a formula.

An appraiser queries NameBio for recent transactions matching length, pattern (NL, LN, LLN, and the rest), and chip-letter composition, applies a no-4 filter, excludes outliers, then adjusts for end-user versus investor context.

The discipline is light at the four-character floor, where the pool is so deep that comps are abundant, but in the two-character tier a single chip-letter difference swings the estimate by five figures.

How these mixed bands map onto the wider short-domain market is set out in Premium domain pricing tiers explained, and the metric framework that separates a usable inherited backlink profile from a hollow one is compared in Which metric for which acquisition decision.

How the curated catalogue pairs mixed scarcity with SEO authority

A raw mixed-alphanumeric listing reports the pattern and the price, and nothing else. It leaves four things unread:

• The cross-border KYC barrier on the deepest Chinese platforms.
• The trademark exposure a short acronym like 3M carries.
• The penalty history a previously used name inherits.
• The link-metric profile that decides whether the name holds usable SEO authority.

SEO Domains curates premium aged domains that pair short-form scarcity with existing authority and backlink history. Each name is scored on Domain Authority, Domain Rating, Trust Flow, and Citation Flow, and cleared through a 7-vector inheritance screen.

A previously used mixed name carries history a listing never shows.

A mixed .com that hosted a parked page, a redirect network, or a prior operator carries penalty residue that surfaces in the Wayback Machine and the archived backlink profile, and a raw listing reports none of it.

Short acronyms add trademark exposure on top, since a string like 3M maps to an active mark, and the cross-border path adds its own friction with KYC barriers on the deepest Chinese platforms.

An acquisition that skips these checks inherits whatever the pattern hides. The cost of sourcing from unscreened channels is examined in Free expired domains: the hidden cost and why investment-grade domain acquisition starts at the curated marketplace.

Mixed scarcity plus existing authority is the curated differentiator.

Pure-pattern marketplaces price a mixed name on its pattern and chip letters alone.

The SEO Domains catalogue adds the layer those marketplaces skip: existing SEO authority and backlink history, surfaced as Domain Authority, Domain Rating, Trust Flow, and Citation Flow, and bounded by the screening that filters trademark and penalty residue before listing.

The result spans $100 entry-level domains through $1.5 million premium acquisitions, pre-sorted so a buyer reviews vetted inventory instead of clearing cross-border barriers and trademark checks on a raw name.

ICANN-accredited transfer applies to every acquisition.