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RPC Visibility Report - July 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

  • First-seen share became more concentrated in US-East and EU-Central: together they accounted for 80.11% of blocks, up 13.03 percentage points from June.
  • US-East strengthened its lead, rising 5.49 percentage points to 47.44% of first-seen blocks, about 2.8x the equal-share baseline across six monitored regions.
  • The median regional visibility gap widened modestly, increasing by 19 ms from 98 ms in June to 117 ms in July.
  • The extreme tail improved materially: the largest single-block regional spread fell from 22.74 s in June to 9.41 s in July, a 58.6% reduction, though it remained about 80x the monthly median.
  • The highlighted recurring-lag windows shifted toward AP-Northeast: it appeared in two of the three listed windows, including periods where 20.67% and 19.8% of blocks arrived more than 250 ms behind the fastest region.
Top First-Seen Share
47.44%
US-East across 6 monitored regions
Largest Regional Visibility Spread
9.41 s
~80x the 117 ms median regional gap
Median Regional Visibility Gap
117 ms
19 ms wider than 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-East47.44%+5.49 pts vs last month
EU-West7.80%-3.78 pts vs last month
EU-Central32.67%+7.54 pts vs last month
AP-Northeast10.75%-7.04 pts vs last month
US-Central0.61%-1.47 pts vs last month
US-West0.73%-0.74 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
2026-07-26 01:44-02:44 UTC
Delayed
19.8%

59 / 298 blocks were delayed >250ms

P95 lag

354ms

Max lag

1.35s

Rank #2
US-West
2026-07-28 16:09-17:09 UTC
Delayed
3.39%

10 / 295 blocks were delayed >500ms

P95 lag

134ms

Max lag

1.17s

Rank #3
AP-Northeast
2026-07-14 12:06-12:36 UTC
Delayed
20.67%

31 / 150 blocks were delayed >250ms

P95 lag

406ms

Max lag

848ms

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
0xe7be3c…b52009
Spread
9.41s
Rank #2
0x94d84e…f70d18
Spread
3.46s
Rank #3
0x3a1e08…ca44cb
Spread
3.14s