Sydney to Johannesburg ping and RTT: 411.3 ms, 5.7 ms jitter, 108.32 ms fiber floor, and 26.3% efficiency across AS203314. Updated 2026-08-10.

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

As of August 10, 2026, the Sydney → Johannesburg route on Hats Network averages 411.3 ms RTT across a 50-sample daily ICMP echo measurement round, 3.8× the theoretical fiber-floor limit of 108.32 ms.

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

With a stdev-to-average ratio of 1.6%, this route is more stable than the network median of 3.1%. Across the round, per-probe RTT ranged from 403.78 ms to 428.44 ms with a standard deviation of 6.69 ms.

Latency Summary

Metric	Value
RTT	411.3 ms
Jitter	5.7 ms
Packet Loss	0%
Standard Fiber Floor	108.32 ms
Fiber Efficiency	26.3%
Latency Tier	High
Source Region	Asia Pacific
Destination Region	Africa

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: SYD → JNB

50 ICMP echo samples at 100 ms intervals · round 2026-08-10 · avg 411.3 ± 0.95 ms (SE)

Sample distribution: box = interquartile range (406.6–412.8 ms), median 408.7 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 (108.3 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	407.13
2	100	405.02
3	200	415.54
4	300	412.99
5	400	423.74
6	500	411.07
7	600	424.73
8	700	410.58
9	800	406.42
10	900	406.56
11	1000	406.12
12	1100	403.95
13	1200	407.78
14	1300	411.15
15	1400	409.53
16	1500	407.84
17	1600	408.76
18	1700	411.21
19	1800	408.39
20	1900	412.21
21	2000	427.72
22	2100	412.07
23	2200	427.12
24	2300	411.84
25	2400	409.96
26	2500	410.01
27	2600	416.29
28	2700	407.88
29	2800	426.75
30	2900	414.01
31	3000	408.35
32	3100	405.82
33	3200	408.64
34	3300	407.19
35	3400	413.26
36	3500	421.19
37	3600	419.06
38	3700	408.48
39	3800	408.14
40	3900	405.78
41	4000	405.04
42	4100	403.78
43	4200	404.73
44	4300	406.42
45	4400	407.60
46	4500	405.84
47	4600	404.07
48	4700	406.80
49	4800	412.00
50	4900	428.44

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 Sydney (-33.86785, 151.20732) and Johannesburg (-26.20227, 28.04363). It does not disclose either facility address.

Physical Reference	Value
WGS-84 geodesic distance	11,060.7 km
Vacuum RTT floor	73.79 ms
Standard fiber RTT floor ( $n_g=1.4679$ )	108.32 ms
Low-latency fiber material floor	107.88 ms
Engineering floor (5% path allowance)	113.75 ms
Research 1.33× mapped-fiber reference	144.06 ms
Estimated unamplified path loss	2322.8 dB
Transparent optical spans / inline amplifiers	146 / 145
Published RTT inflation over fiber floor	3.8×

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	403.78 ms
Average RTT	411.3 ms
Maximum RTT	428.44 ms
Standard deviation	6.69 ms
Stdev / average	1.6%

RTT trend

Estimated route stability across the selected time window.

Average: 411.5 ms
Minimum: 408.3 ms
Maximum: 415.1 ms
Average loss: 0.03%

Route Context

Departure PoP: Sydney (SYD)
Destination PoP: Johannesburg (JNB)
Region overview: Asia Pacific → Africa
Full global matrix: Backbone Latency Matrix
Physical methodology: Theoretical Fiber Latency

Reverse direction

Johannesburg to Sydney latency and RTT — 411.6 ms

Fastest routes departing Sydney (SYD)

Sydney to Melbourne latency and RTT — 9.7 ms
Sydney to Singapore latency and RTT — 95.4 ms
Sydney to Tokyo latency and RTT — 101.3 ms
Sydney to Taipei latency and RTT — 133.6 ms
Sydney to Los Angeles latency and RTT — 136.4 ms

Fastest routes arriving at Johannesburg (JNB)

Amsterdam to Johannesburg latency and RTT — 171.9 ms
Berlin to Johannesburg latency and RTT — 172.1 ms
London to Johannesburg latency and RTT — 179.8 ms
Paris to Johannesburg latency and RTT — 180.9 ms
Frankfurt to Johannesburg latency and RTT — 188.9 ms

Same corridor (Asia Pacific → Africa)

Singapore to Johannesburg latency and RTT — 310.5 ms
Hong Kong to Johannesburg latency and RTT — 316.9 ms
Taipei to Johannesburg latency and RTT — 330.9 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/syd-jnb.pings.{csv,json,yaml}. When citing, include the route, the measurement round date, and the dataset version — for example: "Hats Network latency dataset, Sydney → Johannesburg 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.

Sydney to Johannesburg Latency, Ping & RTT | AS203314