Johannesburg to Ashburn ping and RTT: 228.5 ms, 5.47 ms jitter, 128.11 ms fiber floor, and 56.1% efficiency across AS203314. Updated 2026-08-10.

🇿🇦 This page compares the published ping and round-trip time (RTT) from Johannesburg (JNB) to 🇺🇸 Ashburn (IAD) with vacuum and optical-fiber physical limits.

As of August 10, 2026, the Johannesburg → Ashburn route on Hats Network averages 228.5 ms RTT across a 50-sample daily ICMP echo measurement round, 1.78× the theoretical fiber-floor limit of 128.11 ms.

Among the 19 measured routes departing Johannesburg, this route ranks 9th fastest by average RTT.

With a stdev-to-average ratio of 3.2%, this route sits close to the network-wide stability median of 3.1%. Across the round, per-probe RTT ranged from 217.42 ms to 248.73 ms with a standard deviation of 7.26 ms.

Latency Summary

Metric	Value
RTT	228.5 ms
Jitter	5.47 ms
Packet Loss	0%
Standard Fiber Floor	128.11 ms
Fiber Efficiency	56.1%
Latency Tier	Fair
Source Region	Africa
Destination Region	North America

Ping Measurement Series

The chart below renders the 50-sample ICMP echo measurement round for this route; an accessible table of every sample is included with the chart.

Ping series: JNB → IAD

50 ICMP echo samples at 100 ms intervals · round 2026-08-10 · avg 228.5 ± 1.03 ms (SE)

Sample distribution: box = interquartile range (222.1–234.6 ms), median 227.4 ms · whiskers = min–max · diamond = round average · each dot is one measured sample.

How to read this chart

The shaded band spans the measured minimum to maximum RTT of all samples collected up to that point, and the thin line traces the running average. The final position therefore matches the round statistics exactly — the band only widens when a new extreme sample arrives.

The dashed line is the round average, and the shaded band at the bottom is the theoretical fiber-optic floor (128.1 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	224.61
2	100	220.20
3	200	218.64
4	300	217.97
5	400	217.42
6	500	225.49
7	600	219.94
8	700	222.48
9	800	235.54
10	900	226.85
11	1000	223.61
12	1100	234.00
13	1200	225.32
14	1300	225.32
15	1400	221.57
16	1500	221.07
17	1600	233.17
18	1700	235.86
19	1800	225.34
20	1900	231.31
21	2000	236.84
22	2100	231.53
23	2200	224.87
24	2300	220.23
25	2400	218.60
26	2500	221.05
27	2600	228.83
28	2700	229.89
29	2800	231.62
30	2900	222.14
31	3000	228.32
32	3100	248.73
33	3200	239.03
34	3300	229.08
35	3400	239.23
36	3500	233.07
37	3600	236.19
38	3700	236.58
39	3800	237.72
40	3900	234.76
41	4000	232.71
42	4100	234.86
43	4200	241.87
44	4300	238.14
45	4400	225.54
46	4500	227.86
47	4600	220.94
48	4700	220.27
49	4800	226.75
50	4900	222.04

Download This Route's Data

This route's measurement round is published as open data (CC BY 4.0) in CSV, JSON, and YAML. See About This Measurement for citation guidance.

Download this dataset

Per-route ICMP ping series, released under CC BY 4.0. Uncompressed plain text — no decompression step needed.

CSV JSON YAML Full dataset

Theoretical Fiber Latency

The public physical reference uses the GeoNames city centres for Johannesburg (-26.20227, 28.04363) and Ashburn (39.04372, -77.48749). It does not disclose either facility address.

Physical Reference	Value
WGS-84 geodesic distance	13,082 km
Vacuum RTT floor	87.27 ms
Standard fiber RTT floor ( $n_g=1.4679$ )	128.11 ms
Low-latency fiber material floor	127.59 ms
Engineering floor (5% path allowance)	134.53 ms
Research 1.33× mapped-fiber reference	170.38 ms
Estimated unamplified path loss	2747.2 dB
Transparent optical spans / inline amplifiers	172 / 171
Published RTT inflation over fiber floor	1.78×

Attenuation is used to estimate the number of 80 km optical spans; it does not directly slow light. See the full theoretical fiber latency, GeoNames, attenuation, and amplifier methodology.

Stability & Trend

The current measurement round (2026-08-10) collected 50 ICMP echo samples on this route. Distribution statistics from that round:

Round Statistic	Value
Minimum RTT	217.42 ms
Average RTT	228.5 ms
Maximum RTT	248.73 ms
Standard deviation	7.26 ms
Stdev / average	3.2%

RTT trend

Estimated route stability across the selected time window.

Average: 228.7 ms
Minimum: 226.6 ms
Maximum: 230.7 ms
Average loss: 0.01%

Route Context

Departure PoP: Johannesburg (JNB)
Destination PoP: Ashburn (IAD)
Region overview: Africa → North America
Full global matrix: Backbone Latency Matrix
Physical methodology: Theoretical Fiber Latency

Reverse direction

Ashburn to Johannesburg latency and RTT — 228.3 ms

Fastest routes departing Johannesburg (JNB)

Johannesburg to London latency and RTT — 158 ms
Johannesburg to Amsterdam latency and RTT — 163.2 ms
Johannesburg to Paris latency and RTT — 164.4 ms
Johannesburg to Frankfurt latency and RTT — 166 ms
Johannesburg to Marseille latency and RTT — 172 ms

Fastest routes arriving at Ashburn (IAD)

New York to Ashburn latency and RTT — 6.1 ms
Miami to Ashburn latency and RTT — 26.9 ms
Los Angeles to Ashburn latency and RTT — 58.9 ms
Seattle to Ashburn latency and RTT — 62.3 ms
London to Ashburn latency and RTT — 70.5 ms

Same corridor (Africa → North America)

Johannesburg to New York latency and RTT — 221.6 ms
Johannesburg to Miami latency and RTT — 259.3 ms
Johannesburg to Seattle latency and RTT — 280.3 ms

About This Measurement

Published RTT reflects best-case backbone path behavior measured with ICMP echo probes between PoPs. End-user latency also depends on local access networks, congestion, routing policy, and traffic engineering. None of these values is an SLA.

The measurement round behind this page is published as open data under CC BY 4.0 in the Hats Network latency dataset. Per-pair files are available at /opendata/latency/latest/pairs/jnb-iad.pings.{csv,json,yaml}. When citing, include the route, the measurement round date, and the dataset version — for example: "Hats Network latency dataset, Johannesburg → Ashburn round 2026-08-10, CC BY 4.0".

Data auto-generated on August 10, 2026. Explore the full interactive latency matrix or browse more city-pair routes.

Johannesburg to Ashburn Latency, Ping & RTT | AS203314