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The RealValidator Team Editorial team

ASN (Autonomous System Number) concentration measures how much of the total Solana network stake runs on a given network operator's infrastructure. A validator on an ASN that hosts many other validators contributes to network correlation risk — a single ASN-level outage or compromise could affect a meaningful slice of consensus. The SFDP applies a hard cap effective May 1, 2026: validator ASN concentration must remain below 25% and data-center concentration below 15% for SFDP eligibility.

At epoch 971, the wiki universe contains 10 validators on ASNs holding less than 0.10% of total network stake — meaning these validators add new ASN diversity rather than reinforcing existing concentration. See the ASN glossary entry for the underlying mechanics.

Methodology

  • Universe: the 28 validators in this wiki's directory
  • Source: Stakewiz API (asn_concentration, city_concentration), snapshot at epoch 971 (~2026-05-15)
  • Primary ranking metric: ASN concentration ascending (lower = better — validator's ASN holds less network stake)
  • Tiebreaker: city concentration ascending (under-concentrated cities preferred)
  • Excluded: none — all 28 validators have published ASN data

Top 10 by lowest ASN concentration (epoch 971)

Rank Validator ASN ASN org ASN concentration City City concentration
1 HelixNode AS34123 Netorn Broadband Network 0.00% Moscow 0.03%
2 binance staking AS14618 Amazon Data Services NoVa 0.00% Ashburn 0.24%
3 Grassets Tech AS201265 Anafra A.S. 0.00% Prague 0.27%
4 Orca AS32209 Momentum Telecom 0.00% London 5.75%
5 LimeChain AS8860 DELTA SOF BIX 0.00% Sofia 0.00%
6 ParaFi Technologies AS13767 Announce Media 0.00% Bluffdale 0.00%
7 Code-Breader AS215120 Evolus IT Solutions 0.00% Vienna 0.00%
8 Capital Alliance AS48014 Albhost SH.P.K. 0.02% Hamburg 0.02%
9 nordstar AS34989 Servetheworld AS 0.05% Oslo 0.05%
10 Kolibrio AS58061 Iroko Networks 0.06% Meppel 0.01%

Concentration risks at the other end

This list deliberately omits the validators contributing the most ASN concentration. For completeness, three operators in this directory sit on heavily concentrated infrastructure:

  • Helius (profile) — AS20326 (TeraSwitch, Frankfurt), ASN concentration 29.21%
  • Jupiter (profile) — AS20326 (TeraSwitch, Frankfurt), ASN concentration 29.64%
  • Jito Labs (profile) — AS20326 (TeraSwitch, Singapore), ASN concentration 29.21%

These three validators each run on TeraSwitch (AS20326) infrastructure. The cumulative TeraSwitch share of network stake exceeds 29%, approaching the SFDP 25% threshold effective May 2026. Stakers concerned with decentralization should weigh this when choosing among the top-stake-weight cohort.

A fourth wiki-listed validator on AS20326 — Bitwise Onchain Solutions — operates from a different TeraSwitch location but contributes to the same ASN-level concentration.

How to use this ranking

A validator at 0.00% ASN concentration is, in practice, the only meaningfully staked validator on its ASN — delegating SOL to it adds genuinely new network diversity. A validator at 25%+ ASN concentration adds capital to an already-concentrated operator.

For SFDP eligibility specifically (the Foundation's program that bootstraps new validator stake), the May 2026 thresholds are hard cutoffs: validators above 25% ASN or 15% data-center concentration are excluded from new stake matching. The current TeraSwitch cohort is the most visible concentration risk on Solana mainnet in the wiki universe.

Snapshot: Stakewiz API at epoch 971, 2026-05-15. ASN concentration updates each epoch as stake redistributes.