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RPC Visibility Report - August 2026

A monthly look at Ethereum block visibility across six monitored regions: where blocks appeared first, when regional lag persisted, and which blocks had the widest cross-region visibility spreads.

Key Findings

  • US-East pulled further ahead: it was first to see 56.47% of blocks, up 9.03 percentage points from July. EU-Central fell to 21.60%, down 11.07 points.
  • The typical regional gap narrowed slightly: the median visibility gap was 109 ms, down 8 ms from 117 ms in the July report.
  • The worst single-block gap shrank sharply: 1.56 s in August versus 9.41 s in July, a reduction of 7.85 s or 83%. It was still about 14x the monthly median.
  • AP-Northeast was the recurring lagging region: it appeared in all three highlighted windows, up from two in July. In those windows, 42.67%–47.33% of blocks arrived more than 250 ms after the fastest region.
Top First-Seen Share
56.47%
US-East across 6 monitored regions
Largest Regional Visibility Spread
1.56 s
~14x the 109 ms median regional gap
Median Regional Visibility Gap
109 ms
down 8 ms from last month
Coverage: 222,352 blocks were observed across all monitored regions.

1. Regional First-Seen

For each block, QuantLoop reports which monitored region observed the block first.

How to read this
Expand

This section answers: which monitored region observed each new Ethereum block first?
Because each region has multiple monitored providers, QuantLoop uses the earliest observation recorded inside each region.

Values labeled "pts vs last month" show the percentage-point change from the previous monthly report.

First-Seen Share by Region
Share of blocks first observed by each monitored region.
US-East56.47%+9.03 pts vs last month
EU-West4.39%-33.41 pts vs last month
EU-Central21.60%-11.07 pts vs last month
AP-Northeast14.37%+3.62 pts vs last month
US-Central1.67%+1.06 pts vs last month
US-West1.48%+0.75 pts vs last month

2. Elevated Regional Lag

Time windows where one region repeatedly received blocks later than the fastest region.

How to read this
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This section highlights detected lag windows where one region repeatedly received blocks later than the fastest region.

Each row covers one detected lag window. QuantLoop counts how many blocks in that window were delayed by more than a threshold for the listed region.

Share shows how much of the window was affected. Higher share means more persistent lag.

Highlighted regional lag windows
Detected windows with repeated regional lag, including the threshold and share of blocks affected.
Rank #1
AP-Northeast
2026-08-23 02:43 → 03:13 UTC
Delayed
47.33%

71 / 150 blocks were delayed >250ms

P95 lag

336ms

Max lag

2.49s

Rank #2
AP-Northeast
2026-08-14 00:28 → 00:58 UTC
Delayed
44%

66 / 150 blocks were delayed >250ms

P95 lag

389ms

Max lag

970ms

Rank #3
AP-Northeast
2026-08-23 01:29 → 01:59 UTC
Delayed
42.67%

64 / 150 blocks were delayed >250ms

P95 lag

355ms

Max lag

2.35ms

3. Largest Regional Visibility Spreads

Blocks with the widest timing gap between the first region that saw the block and the last region that saw it.

How to read this
Expand

This section answers a simple question: for the same block, how far apart were the first regional observations?

For each block, QuantLoop takes the earliest observation within each region. Regional visibility spread is the time between the earliest regional first-seen timestamp and the latest regional first-seen timestamp.

Largest regional visibility spreads
Single-hash blocks with the widest first-seen spread across monitored regions.
Rank #1
0x303d0d…842c38
Spread
1.56s
Rank #2
0x31fba8…3648fd
Spread
1.49s
Rank #3
0x46d4ea…29446c
Spread
1.48s